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प्रश्न
Name a device that help to measure the potential difference across a conductor.
उत्तर
The potential difference across a conductor is measured by an instrument called voltmeter.
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संबंधित प्रश्न
What is meant by saying that the potential difference between two points is 1 V?
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.
How much energy is transferred by a 12 V Power supply to each coulomb of charge which it moves around a circuit?
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Write down the formula which states the relation between potential difference, current, and resistance.
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Suppose there are three resistors A, B, and C having resistances r1, r2, and r3 respectively. If R represents their equivalent resistance, establish the following relation `1/"R" = 1/"r"_1 + 1/"r"_2 + 1/"r"_3`, when joined in parallel.
The figure shows a circuit. When the circuit is switched on, the ammeter reads 0.5 A.
(i) Calculate the value of the unknown resistor R.
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(iii) Calculate the power dissipated in the 3 Ω resistor.
Conceptual question.
A bird sitting on a high power electric line is still safe. How?
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