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Standard X

Physics

Find the resi...

Question

Find the resistance of an electric motor which when connected across a battery of $6$ volts for 1 min consumes $216$ 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

Work done = $216 J$
Potential difference $V$ = $6 V$
$t = 1 m i n = 60 s$
Now, W= $\frac{V^{2}}{R} \times t$

R= $\frac{V^{2}}{W} \times t$ = $\frac{6^{2}}{216} \times 60$ = $10 Ω$

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Standard X Physics

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

The correct option is C 10Ω Work done = 216 J Potential difference V = 6 V t = 1 min = 60 s Now, W=V2R×t R=V2W×t = 62216×60 = 10 Ω

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

The correct option is C
10Ω

Work done = $216 J$
Potential difference $V$ = $6 V$
$t = 1 m i n = 60 s$
Now, W= $\frac{V^{2}}{R} \times t$

R= $\frac{V^{2}}{W} \times t$ = $\frac{6^{2}}{216} \times 60$ = $10 Ω$