Question

In a resistance of $25\Omega$ A.C. is passed to produce heat of the rate of $250$ watt. The value of current in the resistance will be?

• A. $0.316$A
• B. $1$A
• C. $3.16$A
• D. $10$A

Answer 1

The correct option is C $3.16$A

We know heat generated is expressed by the equation $H=I^{2}Rt$; where I= current ,R= resistance and t= time

Given resistance $R=25\Omega$ and considering time t= 1 second, we get current $I==\sqrt{\frac{250}{25}}=\sqrt{10}=3.16A$