Question

Initially bulbs A and B in (Figure 1) are glowing.

What happens to bulb B if the switch is closed? Does it get brighter, stay the same, get dimmer, or go out?

Answer 1

Initially the bulbs are glowing if switch is closed the bulb \(\mathrm{A}\) is brighter because the resistance of the circuit is decreases. So, current passing through the circuit.

The bulb \(\mathrm{B}\) is go out because the maximum current passing through switch, it get shorted.