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प्रश्न
Find the potential difference required to flow a current of 300 mA in a wire of resistance 20 Ω.
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उत्तर
Potential difference V = ?
Current I = 300 mA = 0.2 A,
R = 20 Ω
V = IR
V = `3/10 xx 20`
= 6 V
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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.
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| Current, I (in amperes) | : | 0.1 | 0.2 | 0.4 | 0.6 | 0.8 | 1.0 |
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