Question

What is amount of current required by heating coil of 100 ohm resistor if it’s switch on for 20 seconds to produce 72000 jule energy

Answer 1

Answer:

146Amps

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Answer 2

Answer:

I=6 amperes

Explanation:

we know,

H=I^2RT

72000=I^2 × 100 × 20

72000=I^2 × 200

72000/200=I^2

36=I^2

√36=I

therefore, 6=I

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