Question

Which has higher resistance- a 50W bulb or a 2.5 W bulb and how many times?

Answer 1

GIVEN ;-

⇒ A 50  watts bulb

⇒ A 2 .5 watts bulb


TO FIND ;-

⇒ Which has higher resistance and by how much ?


SOL ;-

                ''  ⇒  A less power has always the higher resistance ''

                   ⇒ 2. 5 watts has more resistance than 50 watts


And also we know that -'' Power is inversely proportional to the resistance''


                       ⇒ Power = voltage × voltage / resistance

                        ⇒ Rα1/p

Let us take  50 watt as R -1 and resistor - 2 as 2. 5 watt bulb

Now let us find how many times it has more resistance


R - 1/ r - 2  ⇒ 50 / 2.5 ⇒20 times.

⇒So 2.5 watts is 20 times more than 50 watts of bulb.