True or false. Provide an explanation. (a) The induced emf in a circuit is equal

Question

True or false. Provide an explanation. (a) The induced emf in a circuit is equal to the negative ofthe magnetic flux through the circuit. (b) There can be a nonzero induced emf at an instant when theflux through the circuit is equal to zero. (c) The self-inductance of a solenoid is proportional to therate of change of the current in the solenoid. (d) The magnetic energy density at some point in space isproportional to the square of the magnitude of the magnetic fieldat that point. (e) The inductance of a solenoid is proportional to thecurrent in it. (a) The induced emf in a circuit is equal to the negative ofthe magnetic flux through the circuit. (b) There can be a nonzero induced emf at an instant when theflux through the circuit is equal to zero. (c) The self-inductance of a solenoid is proportional to therate of change of the current in the solenoid. (d) The magnetic energy density at some point in space isproportional to the square of the magnitude of the magnetic fieldat that point. (e) The inductance of a solenoid is proportional to thecurrent in it.

Explanation / Answer

.       = - N / t . Hence it is false. . (b)     False . (c)     False . (d)     We know that : .           Magneticenergy density U = ( 1/8 ) * B2 .           Henceit is true . (e)      We know that : .             L   = N / i    .           Hence it is true . Hope this helps u!

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