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An electric bulb is marked 100 w - 230 V...

An electric bulb is marked 100 w - 230 V . How much energy is produced in 20 miutes when operted at 230 V ?

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The correct Answer is:
`1.2 xx10^(5)`
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CHHAYA PUBLICATION-ELECTRIC ENERGY AND POWER-Problem Set - I
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  10. Each of two electric lamps of power 500 W is designed to work in 220 V...

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