Transformation ratio of one transformer is 1:2. If Leclanche cell having emf 1.5 V is connected to primary coil of a transformer then voltage obtained across its secondary is ………..

Options

A. 3 V
B. 1.5 V
C. 0.75 V
D. 0

Answer

D

Explanation

Because Leclanche cell is a D.C. supply and so it gives constant voltage to primary which does not change its magnetic flux and so no emf is induced across secondary because
`epsilon_2=-M(dI_1)/(dt)=0 " " (because (dI_1)/(dt)=0)`