A resistor and an inductor in series are connected to a battery through a switch.
After the switch has been closed –
A
Rate of increase of magnetic energy stored in inductor coil is maximum when magnitude of current is 
B
Rate of increase of magnetic energy stored in inductor coil is maximum when magnitude of current is 
C
Joule heat dissipated in the resistor change at the fastest rate when magnitude of current is 
D
Joule heat dissipated in the resistor change at the fastest rate when magnitude of current is 
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(a, c)
U mag = 
= V × i – i 2 R
= f (i)
= 0 ⇒ V – 2iR = 0
i = 
= – 2
∴ At i = 
is maximum i.e. i 2
is changing rapidly
i = 
Power dissipated in resistor = i 2 R
When i 2 is changing most rapidly rate of change of power dissipated is maximum.
When i = 
, then i 2 is changing rapidly.
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