©©©©©©™™A student boils the water in an electric kettle for 20 minutes after being switched on. Using the same mains supply,he wants to reduce the boiling time of water. To do so, should he increase or decrease the length of the heating element? Justify your answer. ®®®®®®®®®®®Q2.state whether power is inversely or directly proportional to resistance from contradiction of formulas p=I^2r and p=v^2\r.©©©©©©©©©©©
Answers
yeah sure for your help
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Thanks !
Here is your answer which you are searching for
ANSWER :- 1
We know that length is directly proportional to the resistance
That means if a length reduced resistance is also reduce and We know well , resistance is inversely proportional to current
More electrical energy will flow per second
As a Conclusion We can say that " The boiling point of water will be reduced "
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ANSWER :-2
let us understand about what the resistance is
Resistance is a property of the material
It depend on length , area of a cross section , resistivity of a conductor
p=I^2r and p=v^2\r
This power equation is nothing just gives relationship of power to resistance under two conditions :-
>> When current is constant
>> When voltage is constant
AS , a conclusion power is nothing to do with resistance
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Warm Regards
@Brainlestuser
Answer:
Step-by-step explanation:
The length of the wire should be increased as resistance will also increase and will produce more heat to boil the water