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Questions
Define the following:
One ohm
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Solution
One ohm is the resistance of a component when the potential difference of one volt applied across the component drives a current of one ampere through it.
RELATED QUESTIONS
If the potential difference across the ends of a conductor is 220 V and the resistance of the conductor is 44 Ω (ohm), then the current flowing through is _________.
- 0.2 A
- 0.5 A
- 2 A
- 5 A
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Name the law which is illustrated by the above V−I graph.
The resistors R1, R2, R3 and R4 in the figure given below are all equal in value.
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Calculate the effective resistance across AB?
The filament of a bulb takes a current 100 mA when potential difference across it is 0.2 V. When the potential difference across it becomes 1.0 V, the current becomes 400 mA. Calculate the resistance of filament in each case and account for the difference.
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SI unit of resistance is:
What is non ohmic device?
Two cells each of 5V are connected in series across an 8Ω resistor and three parallel resistors of 4Ω, 6Ω, and 12Ω. Draw a circuit diagram for the above arrangement. Calculate
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The variable resistance is called ____________.
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Reason: V = IR is the equation which defines resistance.
The voltage - current readings of a certain material are shown in the table given below:
| Voltage (V) | 10 V | 20 V | 30 V |
| Current (I) | 2 A | 3 A | 4 A |
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