Question

In a transformer, number of turns in the primary coil are 140 and that in the secondry coil are 280. If current i primary ciol is 4A, then that in the secondary coil is
A. 4A
B. 2A
C. 6A
D. 10A

Answer 1

Correct Answer - B
(b) `N_(p)=140, (N_s)=280, (I_p)=4A,(I_s)=?`
for a transformer (I_s)/(I_p)=(N_p)/(N_s)`
`implies (I_s)/4=140/280 implies (I_s)=2A`.