When a coil is placed in a time dependent magnetic field the power dissipated in it is P . The number of turns, area of the coil and radius of the coil wire are N , A and r respectively. For a second coils number of turns, area of the coil and radius of the coil wire are 2 N , 2A and 3 r respectively. When the first coil is replaced with second coil the power dissipated in it is 
. The value of 
is 
.
Text Solution
Verified by ExpertsA
Power dissipated : 
Induced emf 
Resistance of coil : 
Now : 
Also : 
Thus 
… (i)
… (ii)
Thus : 
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