Questions
In an induction coil, the secondary e.m.f. is
a
Zero during break of the circuit
b
Very high during make of the circuit
c
Zero during make of the circuit
d
Very high during break of the circuit
detailed solution
Correct option is D
In induction coil, current dies out and iron core is demagnetized and rate of withdrawal of flux becomes very large at the time of break and consequently large emf is induced in the secondary.Talk to our academic expert!
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A square wire loop, of side a has a long straight wire carrying a constant current i that passes through the centre of the loop and perpendicular to its plane as shown in Fig.
The current induced in the square loop is
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