Prove that 60 W bulb glows more brightly...

Prove that `60 W` bulb glows more brightly than `100 W` bulb if by mistake they are connected in series.

Text Solution

Verified by Experts

In series we can use the formula
`P=i^2R` for the power consumption
`rArr P prop R` (as i is same in series)
We have seen above that
`R_(60w)gtR_(100w)`
`P_(60w)gtP_(100w)` Hence proved.

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Assertion : The 200 W bulbs glows with more brightness then 100 W bulbs. Reason : A 100 W bulb has more resistance than a 200 W bulb.

If both assertion and reason are ture and reason is the correct explanation of assertion.

If both assertion and reason are true but reason is not the correct explanation of assertion.

If assertion is true but reason is false.

If assertion and reason both are false.

There are two electric bulbs of 40 W and 100 W . Which one will be brighter when first connected in series and then in parallel ?

`40 W` in series and `100 W` in parallel

`100 W` in series and `40 W` in parallel

`40 W` both in series and parallel will be uniform

`100 W` both in series and parallel will be uniform

There are two electric bulbs of 40 W and 100 W . Which one will be brighter when first connected in series and then in parallel,

40 W in series and 100 W in parallel

100 W in series and 40 W in parallel

40 W both in series and parallel will be uniform

100 W both in series and parallel will be uniform