what is the difference between ohmic and nohmic resistors?
1. what is the difference between ohmic and nohmic resistors?
what is the difference between ohmic and nohmic resistors?
Ohmic resistors are the resistors which obey ohms law. Non ohmic resistors are those which do not obey ohms law. in ohmic resistors current is directly proportional to voltage. in non ohmic resistors there is no linear relationship.
An Ohmic device is one which obeys Ohm's Law, V = IR, where R is constant. A non- Ohmic device is one that does not have a constant resistance. ... Therefore, the resistance of the filament is not constant, rather, it increases with increased current.
The main difference between an Ohmic and a non-Ohmic conductor is whether they follow Ohm's law. An Ohmic conductor would have a linear relationship between the current and the voltage. With non-Ohmic conductors, the relationship is not linear. A good example of an Ohmic conductor is the resistor.
2. how to explain ohmic and non-ohmic materials
In electricity, an ohmic material is a substance that follows Ohm's law, which states that the current flowing through a conductor is directly proportional to the voltage applied across it. In other words, an ohmic material has a constant resistance regardless of the voltage applied to it. Metals, such as copper and aluminum, are typical examples of ohmic materials.
On the other hand, a non-ohmic material is a substance that does not follow Ohm's law. Non-ohmic materials have a varying resistance depending on the voltage applied to them. Examples of non-ohmic materials include diodes, transistors, and semiconductors. The resistance of non-ohmic materials changes with voltage because the materials have a non-linear relationship between the current flowing through them and the voltage applied across them.
To explain this difference, we can use the analogy of a water pipe. An ohmic material is like a pipe with a constant diameter. Regardless of the water pressure applied to it, the flow rate remains constant. On the other hand, a non-ohmic material is like a pipe that changes its diameter depending on the water pressure applied. As the water pressure increases, the diameter of the pipe decreases, and the flow rate changes.
In summary, ohmic materials have a constant resistance, while non-ohmic materials have a varying resistance that changes with voltage or current. Ohmic materials follow Ohm's law, while non-ohmic materials have a non-linear relationship between current and voltage.
Answer:
A resistor is 'Ohmic' if as voltage across the resistor is increased, a graph of voltage versus current shows a straight line (indicating a constant resistance). The slope of the line is the value of the resistance. A resistor is 'non-Ohmic' if the graph of voltage versus current is not a straight line.
Ohmic;
The many substances for which Ohm's law holds are called ohmic. These include good conductors like copper and aluminum, and some poor conductors under certain circumstances. Ohmic materials have a resistance R that is independent of voltage V and current I.
Non-Ohmic;
The conductor is non-Ohmic if the current flowing through the conductor and the voltage across the device do not have linear relationship. The non-Ohmic conductor does not obey Ohm's law. The examples of non-Ohmic conductors are filament lamp, semiconductor devices like diodes,transistors, thyristors etc.
Here is the difference between the two:
3. what is the ohmic value of resistor?
Answer:
The bigger the value of a resistor the more it opposes the current flow. The value of a resistor is given in ohms and is often referred to as its 'resistance'.In a true ohmic device, the same value of resistance will be calculated from R = V/I regardless of the value of the applied voltage V. That is, the ratio of V/I is constant, and when current is plotted as a function of voltage the curve is linear (a straight line).
Explanation:
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4. Calculate the ohmic range of a resistor whose resistance value and tolerance are
Answer:
Calculate the ohmic range of a resistor whose resistance value and tolerance are
5. When a voltmeter is connected across the terminals of a resistor, what usually happens to the potential difference across the resistor?
Answer:
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Explanation:
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6. 4 A potential difference across 24 O resistor is 12 V. What is the current through the resistor?
Answer:
I = 0.5 A
Explanation:
I = V / R
I = 12 V / 24 Ω
I = 0.5 A
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7. 1. What is the relationship between resistance and current? 2. What is the relationship between voltage and current? 3. What is the importance of resistors in devices? 4. Why do resistors break/explode?
Answer:
1. Resistance and current have an inverse relationship. This means that as the resistance of a circuit increases, the current flowing through the circuit decreases. Conversely, as the resistance of a circuit decreases, the current flowing through the circuit increases. This relationship is described by Ohm's Law, which states that the current flowing through a circuit is directly proportional to the voltage applied to the circuit and inversely proportional to the resistance of the circuit.
2. Voltage and current have a direct relationship. This means that as the voltage applied to a circuit increases, the current flowing through the circuit also increases. Conversely, as the voltage applied to a circuit decreases, the current flowing through the circuit also decreases. This relationship is described by Ohm's Law, which states that the current flowing through a circuit is directly proportional to the voltage applied to the circuit and inversely proportional to the resistance of the circuit.
3. Resistors are important components in devices because they are used to control the flow of current in a circuit. They are designed to provide a specific amount of resistance to the flow of current, which can be used to limit the amount of current flowing through a circuit or to create voltage drops across specific parts of the circuit. Resistors are also used to protect other components in a circuit by limiting the amount of current that flows through them.
4. Resistors can break or explode for several reasons, including overheating, overloading, or physical damage. Overheating can occur when too much current flows through a resistor, causing it to heat up and potentially burn out. Overloading can occur when a resistor is exposed to a voltage or current that exceeds its maximum rating, causing it to fail. Physical damage, such as a crack or break in the resistor, can also cause it to fail. Additionally, poor quality resistors or manufacturing defects can also contribute to resistor failure.
8. Two equal resistors ra and rb are connected in series and to a 120 volt source what potential difference exists between the midpoint
Answer:
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9. 10 different resistors
Answer:
Carbon Composition Resistors.
Wire wound Resistors.
Thin Film Resistors.
Carbon Film Resistors.
Metal Film Resistors.
Thick Film Resistors.
Metal Oxide Resistors.
Cermet Oxide Resistors (Network Resistors)
Explanation:
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Answer:
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10. What is the difference between Resistor-Transistor Logic(RTL) and Diode Transistor Logic(DTL)?
Answer:
DTL offers better noise margins and greater fan-outs than RTL, but suffers from low speed, especially in comparison to TTL. RTL allows the construction of NOR gates easily, but NAND gates are relatively more difficult to get from RTL. Figure 1 shows an example of a 3-input DTL NAND gate
11. testing Resistor. the resistance reading has a big difference to the Resistor rated color coded value the trouble is
Answer:
Fixed resistors have different coloured rings or bands around them to indicate their resistive value with each coloured band having a decimal value associated with it. ... This is because the actual resistive value can have a percentage variation of resistance either side of the nominal value.
12. explain the importance of used of resistor in different kind of resistor
Answer:
The main function of resistors in a circuit is to control the flow of current to other components. Take an LED (light) for example. If too much current flows through an LED it is destroyed. So a resistor is used to limit the current.
13. difference between fixed and variable resistor
Answer:
Variable resistors means that a resistor which can change its resistance by control by any person or itself. Fixed resistor means that it can not change its value.
14. A potential difference across 24 resistors is 12 V. What is the currect through the resistor
Answer:
The current through the circuit is the same for each resistor in a series circuit and is equal to the applied voltage divided by the equivalent resistance: Note that the sum of the potential drops across each resistor is equal to the voltage supplied by the battery
15. effect of Temperature variation in ohmic conductor and non- ohmic conductor
Answer:
Conductors follow ohm's law when the temperature is in the range for which the conductor has been made but as the temperature increases, ohmic conductors also behave as non-ohmic conductors. In non-ohmic conductors, the resistance of the conductors varies according to the variation in the temperature.
Are ohmic conductors affected by temperature?
Ohmic conductor resistance doesn't change with temperature. If some can be raised to sufficient enough temperature where it does change, then it's said to be non-ohmic at that point. Many 'conductors' are ohmic only within a specific temperature range. A non-ohmic is one whose resistance will vary with temperature.How does temperature affect the resistance of non-ohmic conductors?
A non-ohmic conductor is one in which the voltage and current are not linear. A) The resistance of most conductors increases as the temperature increases, however being ohmic and not ohmic is not the reason. This power is converted into heat which increases the temperature as time goes on16. what is the difference between carbon composition resistor and a wire would resistors
Answer:
Its power rating is from ¼ W to 2W. It has high tolerance and hence, accurate value of resistance cannot be obtained. ... It has low tolerance and hence, accurate value of resistance can be obtained
Answer:
Carbon composition resistors
consist of a solid cylindrical resistive element with embedded wire leads or metal end caps to which the lead wires are attached.Its power rating is from ¼ W to 2W. It can be used at high frequencies. It It has high tolerance and hence, accurate value of resistance cannot be obtained. It has higher order of stability and reliability.It is suitable for high frequency circuits. It has big size which is not suitable for many of the applications.It has high temperature coefficient valueWirewound resistors
commonly made by winding a metal wire, usually nichrome , around a ceramic, plastic or fiberglass coreIts power rating is from 1W to 200W.It cannot be used at high frequencies.It has low tolerance and hence, accurate value of resistance can be obtained.It has low stability and reliability. It has low temperature coefficient valueExplanation:
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17. a 16 ohm resistor is connected to in series with a parallel combination of two resistors, one of which has an ohmic value of 48 ohms, the other R is being unknown. What is the resistance of R if the power taken by the 16-ohm unit is equal to the power in the parallel-connected pair of resistors?
16-ohm unit is equal to the power in the parallel-connected pair of resistors
Therefore,
[tex] \frac{48R}{48 +R} = 16 [/tex]
(cross multiplication)
hence, 48R = 16 x 48 + 16 x R
48R = 768 + 16R
48R - 16R = 768 (transposition)
32R = 768
[tex] \frac{32R}{32} = \frac{768}{32} [/tex] (divide both sides by 32)
R = 24 ohms.
__________________
ANSWER
Therefore, the resistance of R is 24 ohms.
____________________
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18. what is the difference between resistance and resistor? what is their importance?
Answer
Resistance is the property of a conductor
A resistor is an electrical component with a predetermined electrical resistance.
Importance
Resistance is an important factor in electronic circuits, higher resistance makes the current flow more difficult, lower resistance makes the current flow less difficult.
Resistor they may be small and often built-in to other components, but resistors are essential to almost every electrical circuit.
Explanation:
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19. a potential difference accross24current resistor is 12V. what is the current through the resistor
Answer:
If voltage drives current, what impedes it? The electric property that impedes current (crudely similar to friction and air resistance) is called resistance R. Collisions of moving charges with atoms and molecules in a substance transfer energy to the substance and limit current. Resistance is defined as inversely proportional to current, or
20. YOU ARE PRESENTED WITH THREE RESISTORS, EACH MEASURE 30. WHAT IS THE DIFFERENCE BETWEEN THE TOTAL RESISTANCE OF THE RESISTORS COMBINED IN SERIES, AND THE TOTAL RESISTANCE OF THE RESISTORS COMBINED IN PARALLEL?
Answer:
We will need to calculate the total equivalent resistance of the circuit. Since the two resistors are in series, we can simply add them.
Explanation:
the three resistances are equal,so.
R=1 R=2 R=3 =3 Q 1R= 1R1+1R2 +1R3+13+13=33=1 R 1 Q
21. two 30 ohm resistor are connected in series. when a resistor R is connected across one of them the total curcuit resistance is 40 ohms. Calculate the ohmic value of R
Refer to attached image,
[tex]\large\overbrace{\underbrace{\text{$>>>$ see attached picture $<<<$}}}[/tex]
As seen in Figure 1, Initially,
Total Resistance = R1 + R2
Total Resistance = 30 + 30
Total Resistance = 60 Ω
Now refer to Figure 2,
When a resistor R is connected across one of them say to R1,
then the New Total Resistance became 40 Ohms,
So,
New Total Resistance = (R1 // R) + R2
where
New Total Resistance = 40 Ω
R1 // R = total resistance when R1 is connected in parallel to R
solve for R1 // R,
New Total Resistance = (R1 // R) + R2
40 = (R1 // R) + 30
R1 // R = 40 - 30
R1 // R = 10 Ω
Now we solve for R, using parallel resistance formula
[tex]\sf \frac{1}{R_1//R} =\frac{1}{R_1} +\frac{1}{R} \\\\\sf \frac{1}{10} =\frac{1}{30} +\frac{1}{R} \\\\\text{\sf solving for R,}\\\\R = 15 \;ohms[/tex]
[tex]\therefore \large\boxed{\text{\sf The value of R = 15 ohms}}[/tex]
* as always, double check my answers for errors or carelessness.
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22. different types of resistor
•Wire wound resistors.
•Metal film resistors.
•Thick film and Thin film resistors.
•Network and Surface Mount Resistors.
•Variable Resistors.
•Special resistors.
Different types of resistorsFixed Value ResistorsThese are the predominant type of resistor configuration, and as the name suggests, they have a fixed resistance value. It is possible to buy a resistor of any ohmic value that you require, however in the vast majority of cases, it is possible to ‘tweak’ the circuit to change the value that is required. For this reason, all manufacturers will supply families of resistors, with a given number of resistors to each decade of value.
Variable ResistorsVariable resistors (also known as potentiometers) are resistors that can have their value changed either by turning a shaft or in pre-set pots by a screwdriver.
A variable resistor is a three-terminal device. The centre pin with the arrow is known as the wiper and is where the variable resistance is available. The devices come in the form of a moveable contact running along a resistive track, or in the case of multiturn devices used as panel controls, a tightly wound wire. Although useful for tuning resistance values in a circuit, ‘pots’ can be prone to movement of the wiper because of vibration and hence can be problematic if wrongly specified.
Resistor NetworksIt is often the case that multiple resistors of the same value are needed, in data bus pull up applications, for example. For these applications, it is possible to purchase resistor packs either as single inline (SIL) or dual inline (DIL) packages. They can come as multiple non-connected resistors, or with one pin of each resistor connected to a single contact on the package. Although this solution can be more expensive on a per resistor basis, the mounting costs are of course lower as only one insertion is required and so a balance is possible. This consideration has led to the availability of dual resistors in a single pack for potential divider applications.
23. What are the difference between the two resistors in terms of size and capacity?Thank you for answering the question
✏️ANSWER:
Fixed resistors have only one single value of resistance, for example 100, but variable resistors (potentiometers) can provide an infinite number of resistance values between zero and their maximum value.
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24. 13.) What are the two major categories for resistors?a low and high ohmic valueb. fixed and variablec. low and high power valued. commercial and industrial14.) Why does wire wound type of resistor has high power rating?a because it has insulated metallic wire that is winded around a coreof non-conductive materialb. because it has uninsulated metallic wire that is winded aroundcore of non-conductive materialc. because of its properties for high resistance values low power ratingd. because of its active opposition to the flow of current15.) How many connections does a potentiometer have?a. 3b. 1c. 2d. 4
Explanation:
13) C
14) B
15) A
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25. direction: identify the different types of resistor.
Answer:
The types of resistors include: Carbon Composition Resistor. Thermistor. Wire Wound Resistor.
Explanation:
Types of Resistors
Fixed Value Resistors. These are the predominant type of resistor configuration, and as the name suggests, they have a fixed resistance value. ...
Variable Resistors. ...
Resistor Networks. ...
Carbon Film Resistors. ...
Metal Film Resistors. ...
Wirewound Resistors. ...
Metal Oxide Resistors. ...
Metal Strip Resistors.
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26. 5 different kinds of resistors of different value
Answer:
Wire wound Resistors.
Carbon Composition Resistors.
Thin Film Resistors.
Carbon Film Resistors.
Metal Film Resistors.
Step-by-step explanation:
27. a 3-V potential difference is applied across a 6 resistor. What is the current that flows into the resistor?
Ohm's Law
ㅤ
ANSWER :ㅤ
[tex] \boxed{ \large{ \bold{ = 0.5 \: a} } } [/tex]
ㅤ
FORMULA :ㅤ
[tex]i = \frac{v}{r} [/tex]
ㅤ
SOLUTION :ㅤ
[tex]i = \frac{v}{r} [/tex]
= 3/6
= 3 ÷ 6
= 0.5 A
ㅤ
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28. What are the limitations of Ohm's Law?And what are Ohmic Conductors?
Answer:
Ohm's law is not applicable for unilateral networks. The conductors which does not obey ohm's law is called Non – Ohmic Conductors. Semi – conductors like Germanium and silicon do not obey Ohm's law. Other examples include transistor, vacuum tubes, diode and triode valve
29. Two ohmic resistors (R1 and R2) are connected in series with a cell. Find the power of R2, given that the current flowing through R1 and R2 is 0.25 A and voltage across the cell is 6V.
Answer:Draw a circuit with resistors in parallel and in series.
Calculate the voltage drop of a current across a resistor using Ohm’s law.
Contrast the way total resistance is calculated for resistors in series and in parallel.
Explain why total resistance of a parallel circuit is less than the smallest resistance of any of the resistors in that circuit.
Calculate total resistance of a circuit that contains a mixture of resistors connected in series and in parallel.
Explanation:HOPE THIS HELPS !
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30. What are the differences and similarities between fixed resistor and variable resistor? I badly need the answer now..
Answer:
Variable resistors means that a resistor can change its resistance value through the control of a person or himself. Fixed resistance means that it cannot change its value. The fixed resistance has only one value and never changes (except through temperature, age, etc).
An application of this may be where the input voltage is unpredictable (within a range) and the user requires an given voltage. The user can use the variable resistor to set the output voltage to the desired value.
Explanation:
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