Question

The element of a heater is rated (P, V). If it is connected across a source
of voltage , then the power consumed by it will be
(A) P.
(B) 2P
(C)P/2
(D)P/4​

Answer 1

answer : option (D) P/4

it is given that the element of a heater is rated (P, V). If it is connected across a source

of voltage V/2 .

we have to find power consumed by element of the heater.

here resistance of element, R = V²/P

now power consumed by element of heater, P' = (voltage of source)²/Resistance

= (V/2)²/(V²/P)

= V²/4 × P/V²

= P/4

hence power consumed by element of heater is P/4.

therefore, option (D) is correct choice.

Answer 2

$\huge\mathcal{Answer:}$

Option D is the correct answer

$\frac{p}{4}$