Question

1. What happens when P, Q, S is closed and R is opened?

2. What happens when P, Q, R is closed and S is opened? ​

Answer 1

Answer:

in both cases bulb will be glow

Answer 2

Answer:

1.when r is opened bulb glow wth good brightness

but when s is opend bulb glows wth dim light as there is less current supply

i.e there is only onepath pqr