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प्रश्न
Write down the formula which states the relation between potential difference, current, and resistance.
उत्तर
Relation between potential difference and current is V = IR.
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संबंधित प्रश्न
What do the letters p.d. stand for?
The unit for measuring potential difference is:
Keeping the potential difference constant, the resistance of a circuit is halved. By how much does the current change?
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 |
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.
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?
Conceptual question.
A bird sitting on a high power electric line is still safe. How?
A boy records that 4000 joules of work are required to transfer 10 coulombs of charge between two points of a resistor of 50 Ω. The current passing through it is:
Name the instrument which is used to measure the potential difference.
Study the following circuit and find:
- Effective resistance of the circuit
- Current drawn from the battery
- Potential difference across the 5 omega resistor
