when a potential difference of 20v is applied across a metal wire a current of 0.6 A flow through it find corresponding power
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According to Ohm's law, V = IR. That is, R = V/I.
In this case, the voltage is 20 V and the current is 0.05 A.
So, the resistance R = 20/0.05 = 400 ohms.
Now, to make a current of 300 mA flow through the same resistor of 400 ohms, the potential difference to be applied is calculated as follows.
Here, I = 300 mA = 0.3 A and R = 400 ohms.
Therefore, V = 0.3*400 = 120 V.
Hence, to make a current of 300 mA flow through the same resistor of 400 ohms a potential difference of 120 V is applied.
In this case, the voltage is 20 V and the current is 0.05 A.
So, the resistance R = 20/0.05 = 400 ohms.
Now, to make a current of 300 mA flow through the same resistor of 400 ohms, the potential difference to be applied is calculated as follows.
Here, I = 300 mA = 0.3 A and R = 400 ohms.
Therefore, V = 0.3*400 = 120 V.
Hence, to make a current of 300 mA flow through the same resistor of 400 ohms a potential difference of 120 V is applied.
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Explanation:
Power = voltage (v) × current (I)
Power = 20 × 0.6
Power = 12W
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