JKCET SERIES Physics
Electromagnetic Induction
14 previous year questions.
Volume: 14 Ques
Yield: Medium
High-Yield Trend
2
2024 1
2019 1
2018 1
2014 3
2012 1
2011 1
2009 1
2008 2
2006 1
2004 Chapter Questions 14 MCQs
01
PYQ 2004
medium
physics ID: jkcet-20
Current is flowing with a current density in a copper wire. Assuming that each copper atom contributes one free electron and given that Avogadro number Density of copper Electronic charge Atomic weight of copper The drift velocity of electrons is
1
2
3
4
02
PYQ 2006
medium
physics ID: jkcet-20
An electric bulb is rated at Power consumed by it when operated at is
1
2
3
4
03
PYQ 2006
medium
physics ID: jkcet-20
Which factor is immaterial for the wire used in electric fuse?
1
Length
2
Radius
3
Material
4
Current
04
PYQ 2008
medium
physics ID: jkcet-20
According to Lenz's law of electromagnetic induction
1
the induced emf is not in the direction opposing the change in magnetic flux
2
the relative motion between the coil and magnet produces change in magnetic flux
3
only the magnet should be moved towards coil
4
only the coil should be moved towards magnet
05
PYQ 2009
medium
physics ID: jkcet-20
A uniformly wound coil of self-inductance and resistance . is broken up into two identical coils. These coils are then connected parallel across a battery of negligible resistance. The time constant for the current in the circuit is (neglect mutual inductance)
1
2
3
4
06
PYQ 2011
easy
physics ID: jkcet-20
The masses of the three wires of copper are in the ratio 5 : 3 : 1 and their lengths are in the ratio 1 : 3 : 5. The ratio of their electrical resistances is
1
5:03:01
2
: 15 : 1
3
0.053530093
4
1:03:05
07
PYQ 2012
easy
physics ID: jkcet-20
A bar magnet is placed upright on a floor (so that the axis of the magnet is vertical). A copper ring is held above the magnet, with its plane horizontal and released. The copper ring falls in such a manner that its axis always coincides with that of the magnet. What will be the acceleration with which the ring will fall? Acceleration due to gravity is .
1
2
Less than
3
More than
4
the answer will depend upon which pole of the magnet is up
08
PYQ 2012
medium
physics ID: jkcet-20
A short solenoid of radius , number of turns per unit length and length is kept coaxially inside a very long solenoid of radius , number of turns per unit length . What is the mutual inductance of the system?
1
2
3
4
09
PYQ 2012
medium
physics ID: jkcet-20
A conducting rod of length is moving in a uniform magnetic field with a velocity without rotation. The velocity of the rod is perpendicular to the rod, and the motion of the rod is confined to a plane perpendicular to the magnetic field. What is the induced emf developed across the rod?
1
2
3
4
10
PYQ 2014
medium
physics ID: jkcet-20
The Lenz's law is the consequence of the conservation of
1
charge
2
momentum
3
energy
4
None of the above
11
PYQ 2018
medium
physics ID: jkcet-20
Magnetic energy density in an inductor is given by
1
2
3
4
12
PYQ 2019
medium
physics ID: jkcet-20
A square loop of side and resistance is placed vertically in East-West plane. A uniform magnetic field of Tesla is set across the plane in North-East direction. The magnetic field becomes Zero in ms at a steady rate. The magnitude of induced during this interval is
1
2
3
4
13
PYQ 2024
medium
physics ID: jkcet-20
Which of the following factors is the self-inductance associated with a coil independent of?
1
induced voltage
2
current
3
time
4
coil resistance
14
PYQ 2024
medium
physics ID: jkcet-20
Which of the following statement is valid?
1
Lenz’s law is a consequence of the law of conservation of energy
2
Lenz’s law is a consequence of the law of conservation of momentum
3
Lenz’s law is a consequence of the law of conservation of force
4
Lenz’s law is a consequence of the law of conservation of mass