Question

The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux ϕ linked with the primary coil is given by ϕ =  ϕ₀ + 4t, where ϕ is in webers, t is time in seconds and ϕ₀ is a constant, the output voltage across the secondary coil is 

(a) 120 volts 

(b) 220 volts 

(c) 30 volts 

(d) 90 volts

Answer 1

Correct option  (a) 120 volts 

Explanation:

Given : No. of tums across primary N_p = 50

Number of turns across secondary N_s = 1500

Magnetic flux linked with primary,  ϕ  =  ϕ₀ + 4t