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प्रश्न
Write an expression for the electrical power spent in flow of current through a conductor in terms of resistance and potential difference.
उत्तर
Electrical Power , P = `"V"^2/"R"`
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संबंधित प्रश्न
The values of current (I) flowing through a given resistor of resistance (R), for the corresponding values of potential difference (V) across the resistor are as given below:
| V (volts) | 0.5 | 1.0 | 1.5 | 2.0 | 2.5 | 3.0 | 4.0 | 5.0 |
| I (amperes) | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.8 | 1.0 |
Plot a graph between current (I) and potential difference (V) and determine the resistance (R) of the resistor.
The unit for measuring potential difference is:
Name the law which relates the current in a conductor to the potential difference across its ends.
What is the combined resistance of each of the networks between A and B shown in fig. ?
Point out two differences between e.m.f. and potential difference as applied to electric circuits.
In the figure given below, A, B and C are three ammeters. The ammeter B reads 0.5A. (All the ammeters have negligible resistance.)
Calculate:
(i) the readings in the ammeters A and C.
(ii) the total resistance of the circuit.
Potential near a charge is the measure of its ______ to bring a positive charge at that point.
The SI unit of potential difference is ______.
Define Electric potential.
Twenty-seven drops of same size are charged at 220 V each. They combine to form a bigger drop. Calculate the potential of the bigger drop.
