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12 Questions around this concept.
The resistance of a wire is . It's new resistance in ohm if stretched to
times of its original length will be :
Stretching of wire
If a conducting wire stretches its length increases area of cross-section decreases but volume remains constant
Suppose for a conducting wire before stretching
it’s length = , area of cross-section =
, radius =
, diameter =
,
and resistance
After stretching length =, area of cross-section =
, radius =
, diameter =
and resistance
So
But Volume is constant So
Now
If a wire of resistance R and length l is stretched to length nl, then new resistance of wire is
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Last Date to Apply : 15th September | Campuses in Agartala, Aizawl, Ajmer, Aurangabad, Calicut, Imphal, Itanagar, Kohima, Gorakhpur, Patna & Srinagar
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