Question

Class XII

Physics

Alternating Current

CBSE

NCERT

A transformer with 40 turns in its primary coil is connected to a 120 V AC source. If 20 W of power is supplied to the primary coil, how much power is developed in the secondary coil?

(a) 10 W (b) 20W (c) 80W (d) 160W

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Answer 1

which questions you want there are three questions??

Answer 2

(d) 160W

A  transformer is a device that transfers electric energy from one alternating-current circuit to one or more other circuits, either increasing (stepping up) or reducing (stepping down) the voltage.

Explanation:

Given:

$n = 40$

$p = 20W$

$n$ = number of turns

$p$ = power

W.K.T

$p = n*v/w$

= $40*120/20$

$p = 160W$.

A transformer with 40 turns in its primary coil is connected to a 120 V AC source. If 20 W of power is supplied to the primary coil, the power developed in the secondary coil is $160W$