Question

In the following circuit the bulb will become suddenly bright if

(a) contact is made 

(b) contact is broken 

(c) contact is made or broken 

(d) Won't become bright at all

Answer 1

The correct option (b) contact is broken

Explanation:

When contact is broken, current in the circuit decreases. To oppose this inductor releases current and emf is induced. This induced emf is having high value hence bulb will become suddenly bright.