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प्रश्न
An electric device gives out 5760 J of heat energy in 1 min, when current flows through it at a p.d. of 24 V. Find the resistance of the device.
संख्यात्मक
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उत्तर
H = 5760 J; V = 24 V; t = 1 min = 60 s
\[\text{Heat energy} = \frac{\mathrm{V}^{2} \times t}{\mathrm{R}}\]
\[\therefore \mathrm{R} = \frac{\mathrm{V}^{2} \times t}{\text{Heat energy}}\]
\[= \frac{24 \times 24 \times 60}{5760}\]
\[= \frac{34560}{5760}\]
\[= 6\ \Omega\]
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