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प्रश्न
An electric kettle draws a current of 4 A for 2.5 min. If the resistance of its element is 100 Ω, calculate the electric energy drawn by the kettle in kilojoules.
संख्यात्मक
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उत्तर
I = 4 A; R = 100 Ω; t = 2.5 min = 150 s
∴ Energy released = I2 × R × t
= (4)2 × 100 × 150
= 240000 J
= 240 kJ
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