Answers

2015-05-11T18:32:23+05:30
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 

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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.

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