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Electric Power

An electric b...

Question

An electric bulb if resistance 400ohm draw a current of 0.5A calculate the energy consumed by it for a month if it is used for 5 hours daily

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Solution

Dear student
$P = I^{2} R = 0.5 \times 0.5 \times 400 = 100 W E n e r g y = p o w e r \times t i m e = 100 \times 5 \times 30 = 15000 W H = 15 K W H$

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