12 Physics Current Electricity - Set No : 47 Question No :2
Question No : 2
In the given figure.  are three identical bulbs. When
the switch  is closed  |
| a) | The brightness of bulb  does not change and that of  decreases | b) | The brightness of bulb increases and that of decreases |
| c) | The brightness of increases bulb does not glow | d) | The brightness of both bulbs  decrease |
Answer No : 2
| (b)When switch
is pressed, the resistance of
circuit decreases. Hence, the current in bulb A will increase but the
current in bulb will decrease. Hence, the
brightness of bulb will increase and that of bulb will decrease. |