The potential difference applied across a …
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The potential difference applied across a given resistor is altered so that the heat produced per second increased by a factor of 9 . By what factor does the applied potential difference change
Posted by Vishaal Velu 8 years, 3 months ago
- 4 answers
Pratit Luthra 8 years, 3 months ago
There is nothing like fist term and second term, when you reach in class 12
Lovely Belwal 8 years, 3 months ago
This question is of first term .. And this of second term exam ....
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Naveen Sharma 8 years, 3 months ago
Ans. Let original Potential difference applied is V and original Heat Produced is H.
Then, H = V2tR…………(1)
New potential difference is V' and Heat Produced after change is H'.
Then,
H′=V′2tR …………(2)
According To question,
H' = 9H
=>V′2tR=9×V2tR
=> V'2 = 9V2
=> V' = 3V
So potential difference is increased by a factor 3.
2Thank You