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Standard VIII

Physics

Heating Effect of Current

Find the resi...

Question

Find the resistance of an electric motor which when connected across a battery of 6 volts for 1 min runs with 216 Joules of energy

5Ω

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6Ω

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10Ω

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36Ω

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Solution

The correct option is C
10Ω

W = 216 J
V = 6v
T = 1 × 60 sec
R = V × V × T/W
R = 6 × 6 × 60/216 = 10Ω

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Find the resistance of an electric motor which when connected across a battery of 6 volts for 1 min runs with 216 Joules of energy

The correct option is C 10Ω W = 216 J V = 6v T = 1 × 60 sec R = V × V × T/W R = 6 × 6 × 60/216 = 10Ω

The correct option is C
10Ω

W = 216 J
V = 6v
T = 1 × 60 sec
R = V × V × T/W
R = 6 × 6 × 60/216 = 10Ω