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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.
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उत्तर
Electrical Power , P = `"V"^2/"R"`
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संबंधित प्रश्न
Calculate the work done in moving a charge of 4 coulombs from a point at 220 volts to another point at 230 volts.
b. The values of potential difference V applied across a resistor and the correponding values of current I flowing in the resistor are given below:
| Potential difference, 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 |
Plot a graph between V and I, and calculate the resistance of the resistor.
c. Name the law which is illustrated by the above V-I graph.
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A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance if the wire is doubled itself.
A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance if the wire is stretched to double its length?
If P and V are the power and potential of device, the power consumed with a supply potential V1 is:
The SI unit of potential difference is ______.
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Study the following circuit and find:
- Effective resistance of the circuit
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