Moving Charges and Magnetism
149 CBSE Class 12 Physics previous year questions (PYQs) from 4 papers, 2023 to 2026, with answers and worked solutions.
About this chapter
- Difficulty: 16 easy · 102 moderate · 31 hard.
- Most-asked subtopics: Magnetic Force and Motion in a Magnetic Field (44), The Moving Coil Galvanometer (28), Biot-Savart Law and Field of a Circular Loop (27).
- Updated 13 September 2026.
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#1EasyAmpere's Circuital Law and the Solenoid
#2ModerateHas imageBiot-Savart Law and Field of a Circular Loop
#3ModerateMagnetic Force and Motion in a Magnetic Field
#4ModerateBiot-Savart Law and Field of a Circular Loop
#5ModerateThe Moving Coil Galvanometer
A galvanometer is an instrument used to show the direction and strength of the current passing through it. In a galvanometer, a coil placed in a magnetic field experiences a torque and hence gets deflected when a current passes through it. The name is derived from the surname of Italian scientist L. Galvani, who in 1791 discovered that electric current makes a dead frog's leg jerk. A spring attached with the coil provides a counter torque. In equilibrium, the deflecting torque is balanced by the restoring torque of the spring and we have : where N is the total number of turns in the coil A is the area of cross-section of each turn B is the radial magnetic field k is the torsional constant of the spring is the angular deflection of the coil As the current which produces full scale deflection in the galvanometer is very small, the galvanometer cannot as such be used to measure current in electric circuits. A small resistance, called shunt, of a suitable value is connected with the galvanometer to convert it into an ammeter of desired range. By using a higher resistance, a galvanometer can also be converted into a voltmeter.#6ModerateBiot-Savart Law and Field of a Circular Loop
#7HardAmpere's Circuital Law and the Solenoid
#8ModerateMagnetic Force and Motion in a Magnetic Field
#9ModerateHas imageForce Between Parallel Currents
#10ModerateMagnetic Force and Motion in a Magnetic Field
#11ModerateMagnetic Force and Motion in a Magnetic Field
#12HardHas imageMagnetic Force and Motion in a Magnetic Field
#13HardTorque on a Current Loop and Magnetic Dipole
#14ModerateBiot-Savart Law and Field of a Circular Loop
#15ModerateThe Moving Coil Galvanometer
#16ModerateMagnetic Force and Motion in a Magnetic Field
#17ModerateThe Moving Coil Galvanometer
#18HardForce Between Parallel Currents
#19ModerateHas imageMagnetic Force and Motion in a Magnetic Field
#20ModerateMagnetic Force and Motion in a Magnetic Field
#21HardHas imageBiot-Savart Law and Field of a Circular Loop
#22ModerateTorque on a Current Loop and Magnetic Dipole
#23EasyForce Between Parallel Currents
#24ModerateTorque on a Current Loop and Magnetic Dipole
#25ModerateMagnetic Force and Motion in a Magnetic Field
#26ModerateTorque on a Current Loop and Magnetic Dipole
#27ModerateBiot-Savart Law and Field of a Circular Loop
#28ModerateForce Between Parallel Currents
#29ModerateHas imageBiot-Savart Law and Field of a Circular Loop
#30ModerateMagnetic Force and Motion in a Magnetic Field
#31ModerateMagnetic Force and Motion in a Magnetic Field
#32HardHas imageBiot-Savart Law and Field of a Circular Loop
#33ModerateTorque on a Current Loop and Magnetic Dipole
#34ModerateForce Between Parallel Currents
#35EasyForce Between Parallel Currents
#36ModerateTorque on a Current Loop and Magnetic Dipole
#37EasyThe Moving Coil Galvanometer
#38ModerateTorque on a Current Loop and Magnetic Dipole
#39ModerateMagnetic Force and Motion in a Magnetic Field
#40ModerateMagnetic Force and Motion in a Magnetic Field
#41ModerateThe Moving Coil Galvanometer
#42EasyTorque on a Current Loop and Magnetic Dipole
#43ModerateBiot-Savart Law and Field of a Circular Loop
#44ModerateBiot-Savart Law and Field of a Circular Loop
#45HardHas imageBiot-Savart Law and Field of a Circular Loop
#46ModerateThe Moving Coil Galvanometer
A galvanometer is used to detect or/and measure small currents in an electrical circuit. It essentially works on the fact that a current-carrying coil experiences a deflecting torque when placed in a magnetic field. This deflection in the coil can be measured and it is related to the current flowing in the coil, the number of turns in the coil, area of the coil and the magnetic field. A hair spring attached to the coil provides a counter torque and helps in measuring the deflection. A galvanometer can be converted to an ammeter or a voltmeter of desired range by using suitable resistances.#47ModerateThe Moving Coil Galvanometer
A galvanometer is used to detect or/and measure small currents in an electrical circuit. It essentially works on the fact that a current-carrying coil experiences a deflecting torque when placed in a magnetic field. This deflection in the coil can be measured and it is related to the current flowing in the coil, the number of turns in the coil, area of the coil and the magnetic field. A hair spring attached to the coil provides a counter torque and helps in measuring the deflection. A galvanometer can be converted to an ammeter or a voltmeter of desired range by using suitable resistances.#48ModerateBiot-Savart Law and Field of a Circular Loop
#49ModerateHas imageAmpere's Circuital Law and the Solenoid
#50ModerateBiot-Savart Law and Field of a Circular Loop
Showing the first 50 of 149.
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