KCET2017PhysicsMagnetic Effects of Current
The output of a step down transformer is measured to be ( 48 ~V ) when connected to a ( 12 ~W ) bulb. The value of peak current is
Options
- A( ( 1 2 ~A )
- B( 2 A )
- C( 1 2 2 A )
- D( 1 4 A )
Correct answer
C. ( 1 2 2 A )
Step-by-step solution
Given, output of step down transformer is 48 ~V peak secondary voltage V_ s =48 v Also, power at secondary P_ s =12 W Now, current at secondary, I_ s = P_ s V_ s = 12 48 =0.25 ~A Thus, value of peak current is I_ S 2 =0.25 2 = 1 2 2 A