Question

which will offer more resistance a 50w lamp or 25w lamp bulb and how many times

Answer 1

hey!!

here is your answer!!
Resistance R = V2/P, where V is the potential difference and P is the power in Watts.

So, the more the power, the lower will be the resistance and vice versa.

Assuming the voltage for the two bulbs are same,

In the first case, R1 = V2/50

In the second case, R2 = V2/25

Therefore, R1/R2 = 1/2

Or, R2 = 2R1.

Thus, 25 W bulb will have double the resistance as compared to 50 Watt bulb.

hole it help you :-D
 

Answer 2

Hey mate !!

Here's the answer !!

Given: 

50 W lamp, 25 W lamp.

To find:

Which has more resistance

Proof:

We know that,

$Power = \frac{Voltage}{Resistance}$

=> Power is inversely proportional to resistance.

Therefore bulb which offers less power will give more resistance.

Therefore 25 W bulb offers more resistance.

Since power is 1 / 4 times the resistance offered would be reciprocal of Power which is 4 times.

Hence Resistance = 4 times.

Hope my answer helped you !!

Cheers !!