Electromagnetic Induction
Quiz by Indira Menon
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- Q1
. Whenever the magnetic flux linked with an electric circuit changes, an emf is induced in the circuit. This is called(a)
(b)
(c) (d)
lenz’s law
kirchhoff’s laws
electromagnetic induction
hysteresis loss
60s - Q2
In electromagnetic induction, the inducedcharge is independent of
time
None of these
change of flux
resistance of te coil
60s - Q3
An induced e.m.f. is produced when a magnet is plunged into a coil. The strength of the induced e.m.f. is independent of
speed with which the magnet is moved
the resistivity of the wire of the coil
number of turns of coil
the strength of the magnet
60s - Q4
. According to Faraday’s law of electromagnetic induction
None of these
electric field is produced by time varying magnetic flux.
magnetic field is produced by time varying electric flux.
magnetic field is associated with a moving charge.
60s - Q5
A moving conductor coil produces an induced e.m.f. This is in accordance with
Coulomb’s law
Lenz’s law
Faraday’s law
Ampere’s law
60s - Q6
. A coil of insulated wire is connected to a battery. If it is taken to galvanometer, its pointer is deflected, because
the induced current is produced
None of these
the coil acts like a magnet
the number of turns in the coil of the galvanometer are changed
60s - Q7
. The polarity of induced emf is given by
Ampere’s circuital law
Biot-Savart law
Fleming’s right hand rule
Lenz’s law
60s - Q8
The self inductance of a coil is a measure of(
induced current
electrical friction
electrical inertia
induced e.m.f.
60s - Q9
The coils in resistance boxes are made from doubled insulated wire to nullify the effect of
pressure
self induced e.m.f.
heating
magnetism
60s - Q10
Two pure inductors each of self inductance L are connected in series, the net inductance is
L
L/2
L/4
2L
60s - Q11
Lenz’s law is a consequence of the law ofconservation of
energy
mass
momentum
charge
60s - Q12
A magnet is moved towards a coil (i) quickly(ii) slowly, then the induced e.m.f. is(a) (i)(b) (i)(c) (d)
larger or smaller depending upon the radius of the coil
larger in case
equal to both the cases
smaller in case
60s - Q13
The laws of electromagnetic induction havebeen used in the construction of a
generator
electric motor
voltmeter
galvanometer
60s - Q14
Two coils are placed closed to each other. The mutual inductance of the pair of coils depends upon
the currents in the two coils.
relative position and orientation of two coils
the material of the wires of the coils
the rate at which currents are changing in the two coils
60s - Q15
Two identical coaxial circular loops carry acurrent i each circulating in the same direction. If the loops approach eachother, you will observe that the current in
each increases
each decreases
each remain the same
one increases whereas that in the other decreases
60s