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Q.

If the current passing through a conductor is doubled, the heat produced will become [[1]].


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Detailed Solution

If the current passing through a conductor is doubled, the heat produced will become four times.
When current flows through a resistor, heat is produced due to friction called the heating effect of electric current or joules law of heating effect, which can be written as H=I2Rt, Where H=heat produced; I= current flowing inside a conductor; R =resistance, and t= time.From this relation, we can say heat produced in a conductor is directly proportional to the square of the current flowing through it. So, if we put I= 2I in the above equation while all parameters remain constant then the heat produced is ' = ( 2 I )2 R t.
H'=4I2Rt 
H'=4H
  
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