Question

When the switch was closed in the circuit shown here, the bulbs did not light up.
May be one of the bulbs is fused. How can it be determined which bulb is fused?
figure

(a) Close the switch and notice which bulb does not light up.
(b) Close the switch after removing one bulb at a time until the others light up.
(c) Close the switch and replace the three bulbs with a new one.
(d) There is no way to find out.

Answer 1

(b) Close the switch after removing one bulb at a time until the others light up.
In this way, we can identify the bulb that is fused.