Question

Consider the following circuit diagram:
Which of the following bulbs would glow when the switch is in its OFF position?

• A. Bulb A
• B. Bulb B and C
• C. None of the bulbs would glow
• D. All of the bulbs would glow

Answer 1

The correct option is C None of the bulbs would glow

The switch in ‘ON’ position completes the circuit and switch in ‘OFF’ position breaks the circuit.
In the given circuit diagram, there is a single path for current to flow so when the switch is in its OFF position, it breaks the circuit and stops the flow of current in the circuit.
Hence, none of the bulbs would glow.