A coil of resistance 
is connected across a 
battery. If the current in the coil is found to be 
after time 
battery is connected, then the inductance of the coil is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
As we know that,
where, 
peak current,……(i)
current in coil and 
time constant 
Since, by using Ohm's law, 
Put in Eq. (i), we get
Taking log both sides, we get
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