KCET2013PhysicsAlternating Current
For a transformed, the turns ratio is 3 and its efficiency is 0.75 . The current flowing in the primary coil is 2 ~A and the voltage applied to it is 100 ~V . Then the voltage and the current flowing in the secondary coil are ... respectively
Options
- A150 ~V , 1.5 ~A
- B300 ~V , 0.5 ~A
- C300 ~V , 1.5 ~A
- D150 ~V , 0.5 ~A
Correct answer
B. 300 ~V , 0.5 ~A
Step-by-step solution
Given, n_ s n_ P =3 ; =0.75 ; I_ P =2 ~A and V_ P =100 ~V We know that, aligned & = V_ S V_ P I_ S I_ P & or = ( n_ s n_ P ) I_ s I_ P ( n_ s n_ p = V_ s V_ p ) & 0.75= 3 I_ s 2 & I_ s =0.5 ~A & By the relation, n_ s n_ P = V_ s V_ P & 3= V_ s 100 V_ s =300 ~V aligned