Question

In the circuit of figure the bulb will become suddenly bright if :

• A. contact is made or broken
• B. contact is made
• C. contact is broken
• D. would not become bright at all

Answer 1

The correct option is C contact is broken

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

The correct option is C.