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प्रश्न
Define electric potential and potential difference.
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उत्तर
- Electric Potential: The electric potential at a point is defined as the amount of work done in moving a unit positive charge from infinity to that point against the electric force.
- Electric Potential Difference: The electric potential difference between two points is defined as the amount of work done in moving a unit positive charge from one point to another point against the electric force.
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संबंधित प्रश्न
What is a voltmeter?
Name the law which relates the current in a conductor to the potential difference across its ends.
The values of potential difference V applies across a resistor and the corresponding values of current I flowing in the resistor are given below:
| Potential differences, V (in volts) | : | 2.5 | 5.0 | 10.0 | 15.0 | 20.0 | 25.0 |
| Current, I (in amperes) | : | 0.1 | 0.2 | 0.4 | 0.6 | 0.8 | 1.0 |
A p.d. of 10 V is needed to make a current of 0.02 A flow through a wire. Wire p.d. is needed to make a current of 250 mA flow through the same wire?
In the circuit shown below:
The potential difference across the 3 Ω resistor is:
The following table shows current in Amperes and potential difference in Volts.
Which law will the graph prove? Explain the law.
What is the combined resistance of each of the networks between A and B shown in fig. ?
If P and V are the power and potential of device, the power consumed with a supply potential V1 is:
Assertion (A): Charges flow from higher potential to lower potential.
Reason (R): Current flows mainly due to the flow of electrons.
