Question

A transformer has 200 turns on the primary and 20 turns on the secondary. The primary is connected to a direct current source of 100 millivolts. The voltage in the secondary coil will be:_______.

A) zero.
B) 10 millivolts.
C) 20 millivolts.
D) 1000 millivolts.

Answer 1

B) 10 millivolts.

Step-by-step explanation:

Given that

The number turns on the primary side ,N₁ = 200 turns

The number turns on the secondary side,N₂ = 20 turns

The voltage on the primary side ,V₁ = 100 m V

The voltage on the secondary side= V₂

We know that relationship between voltage and the number of turns given as

`(V_2)/(V_1)=(N_2)/(N_1)`

`{V_2}={V_1}* (N_2)/(N_1)`

Now by putting the values

`{V_2}={V_1}* (N_2)/(N_1)`

`{V_2}=100* (20)/(200)`

V₂ = 10 m V

Therefore the answer will be B.

B) 10 millivolts.