Question

Choose the correct statement about the given circuit:

Three identical bulbs are connected as shown in the figure.

• A. Bulbs A and B are in parallel with bulb 'C'
• B. The potential (e.m.f) in the circuit is $60$V.
• C. When switch 'S' is turned on all bulbs glow with the same brightness.
• D. Both (a) and (b)

Answer 1

The correct option is D

Both (a) and (b)

1. In the given figure, we can see that bulbs A and B are connected in series and both are in parallel with bulb C.
2. It is also given in the figure that the potential (e.m.f) in the circuit is $60$V.
3. In a parallel circuit, bulbs glow brightly as all the bulbs are connected directly to a battery and derive the required electrical energy.
4. In a series circuit, bulbs glow dimmer because in series potential difference is shared equally across the bulbs.
5. That's why When switch 'S' is turned on all the bulbs don't glow with the same brightness.

Hence, Both (a) and (b) option is correct

Hence, the correct option is (D)