Question

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

Answer 1



Secondary SchoolPhysics5 points

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

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Ask for details FollowReport by SushilBrar06.05.2015

Answers



GalaxyAce

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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Answer 2

hello dear !!

As we know that resistance is inversely proportional to the power of any appliances.


so ,bulb having less power will have higher resistance. ...


so answer is bulb having power 2.5 w will have Comparatively high resistance