Question

The power of a heating coil is $P$. It is cut into two equal parts. The power of one of them across same mains is

• A. 2P
• B. 3P
• C. P/2
• D. 4P

Answer 1

The correct option is A 2P

$H=\frac{v^2\Delta T}{P}$

$H^{\prime }=\frac{v^2}{P^{\prime }}\Delta$

$Given-P^{\prime }=\frac{P}{2}$

$P=2P^{\prime }$

Hence,

option $\left(A\right)$ is correct answer.