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A heater joined in series with a 50 W b...

A heater joined in series with a ` 50 W` bulb is connected to the mains . If the `50 W` bulb is replaced by a `100 W` bulb , then will the heater now give more heat , less heat, or same heat ? Why ?

A

more heat

B

less heat

C

same heat

D

no heat

Text Solution

Verified by Experts

The correct Answer is:
A
If heater of heater is R, then `H=i^2` Rt
`therefore` Resistance of 100 W bulb is less than 50 W bulb.
`therefore` Current in the circuit will Increase causing increase in the heat of heater.
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