AP-EAPCET SERIES Physics
Moving Charges And Magnetism
11 previous year questions.
Volume: 11 Ques
Yield: Medium
High-Yield Trend
11
2022 Chapter Questions 11 MCQs
01
PYQ 2022
medium
physics ID: ap-eapce
A particle of mass and charge is moving at in a circular path of radius inside a solenoid. The solenoid has , and the magnetic field is perpendicular to the plane of the particle’s path. The current in the solenoid is:
( )
( )
1
1.25 mA
2
10.20 mA
3
2.50 mA
4
1.56 mA
02
PYQ 2022
medium
physics ID: ap-eapce
A steel wire with magnetic moment and length is bent into semicircle of radius . Find new magnetic moment.
1
2
3
4
03
PYQ 2022
medium
physics ID: ap-eapce
A magnetic needle points down at to the horizontal. Horizontal component of earth’s magnetic field = 0.3 G. Find the total magnetic field.
1
2
3
4
04
PYQ 2022
medium
physics ID: ap-eapce
Toroid has 4900 turns, , average radius = . Find magnetic field inside core.
1
56 mT
2
54 mT
3
42 mT
4
48 mT
05
PYQ 2022
medium
physics ID: ap-eapce
A particle of charge C moves through a uniform magnetic field T. The particle velocity at some instant is m/s and the magnetic force acting on it is N. The magnitude of is
1
1.0 T
2
2.5 T
3
0.5 T
4
0.75 T
06
PYQ 2022
medium
physics ID: ap-eapce
An electron with kinetic energy moves in a circular path of radius in a magnetic field. Find the approximate magnitude of the magnetic field .
[Given: mass of electron = ]
[Given: mass of electron = ]
1
2
3
4
07
PYQ 2022
medium
physics ID: ap-eapce
Two infinite wires are placed at and along the y-axis, each carrying current upward. An electron is fired from the origin at to the x-axis with speed . The force on the electron at the moment of launch is:
( is the field at origin due to the wire at )
( is the field at origin due to the wire at )
1
2
3
4
08
PYQ 2022
medium
physics ID: ap-eapce
A long solenoid having 100 turns per cm carries a current of A. At the centre of it is placed a coil of 200 turns of cross sectional area 25 cm having its axis parallel to the field produced by the solenoid. When the direction of the current in the solenoid is reversed within 0.04 s, the induced emf in the coil is
1
0.2 V
2
0.04 V
3
0.002 V
4
0.016 V
09
PYQ 2022
easy
physics ID: ap-eapce
A short bar magnet produces a magnetic field of T at a distance of 20 cm from the center of the magnet on the normal bisector of the magnet. The magnetic field produced by this magnet at a distance of 40 cm on the axis is
10
PYQ 2022
medium
physics ID: ap-eapce
Two electrons and , both having mass and charge , are projected perpendicular to a magnetic field . If the kinetic energy of is twice that of , what is the relation between their rotation frequencies and ?
1
2
3
4
11
PYQ 2022
medium
physics ID: ap-eapce
A compass needle oscillates 20 times per minute at a location with dip and magnetic field . It oscillates 30 times per minute at another location where dip is and field is . Find the ratio .
1
2
3
4