Question

The output side of an ideal transformer has 35 turns, and supplies 2.0 A to a 24-W device. Ifthe input is a standard wall outlet, calculate the number of turns on the input side, and the currentdrawn from the outlet.

Answer 1

The current drawn from the outlet is 0.2 A

The number of turns on the input side is 350 turns

Step-by-step explanation:

Given;

number of turns of the secondary coil, Ns = 35 turns

the output current,
`I_s` = 2 A

power supplied,
`P_s` = 24 W

the standard wall outlet in most homes = 120 V = input voltage

For an ideal transformer; output power = input power

the current drawn from the outlet is calculated;

`I_pV_p = P_s\\\\I_p = (P_s)/(V_p) = (24)/(120) = 0.2 \ A`

The number of turns on the input side is calculated as;

`(N_p)/(N_s) = (I_s)/(I_p) \\\\N_p = (N_sI_s)/(I_p) \\\\N_p = (35 * 2)/(0.2) \\\\N_p = 350 \ turns`