ElectroMagnetic InductionHard
Question
In figure, the switch S is closed so that a current flows in the iron-core inductor which has inductance L and the resistance R. When the switch is opened. spark is obtained in it at the contacts. The spark is due to
Options
A.a slow flux change in L
B.a sudden increase in the emf of the battery B
C.a rapid flux change in L
D.a rapid flux change in R
Solution
Sudden increase in the e.m.f. cause the spark in the inductor
Create a free account to view solution
View Solution FreeMore ElectroMagnetic Induction Questions
Magnetic flux through a coil is changes with respect to time then emf induced in it which incorrect regarding induced em...A conducting square loop of side l and resistance R moves in its plane with a uniform velocity perpendicular to one of i...In a cylindrical region uniform magnetic field which is perpendicular to the plane of the figure is increasing with time...When the current in the portion of the circuit shown in the figure is 2A and increasing at the rate of 1A/s, the measure...In a coil of resistance of 10Ω, the induced current developed by changing magnetic flux through it,is shown in figu...