EASY
12th Gujarat Board
IMPORTANT
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Point out the correct direction of the magnetic field in the given figures.

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Important Questions on Moving Charges and Magnetism

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12th Gujarat Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 22
A proton and an electron both moving with the same velocity 5310 ms enter into a region of magnetic field directed perpendicular to the velocity of the particles. They will now move in circular orbits such that
EASY
12th Gujarat Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 23
Under the influence of a uniform magnetic field, a charged particle is moving in a circle of radius R with constant speed v. The time period of the motion
MEDIUM
12th Gujarat Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 24
An electron having mass 9.1×10-31 kg and charge 1.6×10-19 C moves in a circular path of radius 0.5 m with a velocity 106 m s-1 in a magnetic field. Strength of magnetic field is
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12th Gujarat Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 25
Two long straight wires are set parallel to each other. Each carries a current i in the same direction and separation between them is 2 r. Intensity of magnetic field midway between them is
MEDIUM
12th Gujarat Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 26
A moving coil galvanometer has a coil of effective area A and number of turns N. The magnetic field B is radial. If a current I is passed through the coil, the torque acting on the coil is
HARD
12th Gujarat Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 27
A square coil of side 10 cm consists of 20 turns and carries a current of 12 A. The coil is suspended vertically, and the normal to the plane of the coil makes an angle of 30° with the direction of a uniform horizontal magnetic field of magnitude 0.80 T. What is the magnitude of torque experienced by the coil.
MEDIUM
12th Gujarat Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 28
A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0·10T normal to the plane of the coil. If the current in the coil is 5·0 A, what is the total torque on the coil?
MEDIUM
12th Gujarat Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 29
 A circular coil of 30 turns and radius 8.0 cm carrying a current of 6.0 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T. The field lines make an angle of 60°with the normal of the coil. Calculate the magnitude of the counter torque that must be applied to prevent the coil from turning.