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:

6 Ampere is the required current.

Explanation:

We know that,

H=I^2Rt

or,I=√(H/Rt)

or,I=√(72000/100×20)=√(72/2)= √36=6

Hence,I=6 A(ans)