Question
Download Solution PDFA circuit has an inductance of 20H. If the current in the circuit changes at the rate of 50 mA/sec, then self-induced EMF is ______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 2):(1 V)
Concept:
The induced emf is related to the change in current as follows:
e=- L \(di \over dt\)
Where
e is the induced emf,
L is the self-inductance of the coil,
and
di/dt is the rate of change of current in the coil.
Calculation:
L = 20 H
\(di \over dt\) = 50 × 10-3 A\sec
e = -20 × 50 × 10-3
e = 1 V
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