MET SERIES Physics
Electromagnetic Induction
12 previous year questions.
Volume: 12 Ques
Yield: Medium
High-Yield Trend
3
2019 3
2018 1
2017 2
2016 1
2015 2
2010 Chapter Questions 12 MCQs
01
PYQ 2010
medium
physics ID: met-2010
A disc of radius 0.1 m is rotating with a frequency 10 rev/s in a normal magnetic field of strength 0.1 T. Net induced emf is
1
2
3
4
None of these
02
PYQ 2010
medium
physics ID: met-2010
A circuit area 0.01 is kept inside a magnetic field which is normal to its plane. The magnetic field changes from 2 T to 1 T in 1 ms. If the resistance of the circuit is 2 . The amount of heat evolved is
1
0.05 J
2
50 J
3
0.50 J
4
500 J
03
PYQ 2015
medium
physics ID: met-2015
A coil having turns and resistance is connected with a galvanometer of resistance . This combination is moved in time second from a magnetic field weber to weber. The induced current in the circuit is
1
2
3
4
04
PYQ 2016
medium
physics ID: met-2016
Two coils each of self-inductance L are connected in parallel. If they are separated by a large distance, then what will be the self-inductance of combination?
1
2
3
L
4
2L
05
PYQ 2016
medium
physics ID: met-2016
Two coils X and Y are placed in a circuit such that a current changes by 3 A in coil X and magnetic flux changes of 1.2 Wb occurs in Y. The value of mutual inductance of the coils is:
1
0.2 H
2
0.4 H
3
0.6 H
4
3.6 H
06
PYQ 2017
medium
physics ID: met-2017
A short solenoid of length 4 cm, radius 2 cm and 100 turns is placed inside and on the axis of a long solenoid of length 80 cm and 1500 turns. A current of 3 A flows through the short solenoid. The mutual inductance of two solenoids is
1
H
2
H
3
H
4
H
07
PYQ 2018
medium
physics ID: met-2018
In a step-up transformer the voltage in the primary is and the current is . The secondary voltage is found to be . The current in the secondary (neglect losses) is
1
2
3
4
08
PYQ 2018
medium
physics ID: met-2018
A bar magnet is released into a copper ring directly below it. The acceleration of the magnet will be
1
equal to the acceleration due to gravity at that place
2
less than the acceleration due to gravity at that place
3
greater than the acceleration due to gravity at that place
4
twice the acceleration due to gravity at that place
09
PYQ 2018
medium
physics ID: met-2018
A transformer of efficiency has 200 turns in the primary and 40000 turns in secondary. It is connected to a main supply and secondary feeds to a resistance. The potential difference per turn is
1
2
3
4
10
PYQ 2019
medium
physics ID: met-2019
The unit of L/R is (where L = inductance and R = resistance)
1
sec
2
sec
3
volt
4
ampere
11
PYQ 2019
medium
physics ID: met-2019
A coil of 100 turns carries a current of 5 mA and creates a magnetic flux of Wb. The inductance is
1
0.2 mH
2
2.0 mH
3
0.02 mH
4
None of these
12
PYQ 2019
medium
physics ID: met-2019
A physicist works in a laboratory where the magnetic field is 2 T. She wears a necklace enclosing area 0.01 m in such a way that the plane of the necklace is normal to the field and is having a resistance . Because of power failure, the field decays to 1 T in time s. Then what is the total heat produced in her necklace?
1
10 J
2
20 J
3
30 J
4
40 J