Q.
An inductive coil and resistance of 100Ω . When an ac signal of frequency 1000 Hz is fed to the coil, the applied voltage leads the current by 45o . What is the inductance of the coil?
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a
2 mH
b
3.3 mH
c
16 mH
d
5 mH
answer is C.
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Detailed Solution
VLVR=tanΦ=tan45o=1LωR=1L=Rω=1002π×1000=120π=162.8=100062.8×10−3=16mH
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