1.

Heat energy is being produced in a resistance in a circuit at the rate of 100 W. The current of 3 A is flowing in the circuit. What must be the value of the resistance?

Answer»

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Solution :Given : POWER (P) = 100 W, Current (I)= 3 A
To find : Resistance (R )
FORMULA : `P=VI=(IR)I=I^2 R`
Solution : `P=I^2R`
`R=P/I^2=100/3^2=100/9`
`=11.11 OMEGA`
Value of resistance is 11.11 `Omega`.


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