EASY
12th Gujarat Board
IMPORTANT
Earn 100

Point out the correct direction of the magnetic field in the given figures.
(a)
(b)
(c)
(d)

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Important Questions on Moving Charges and Magnetism
EASY
12th Gujarat Board
IMPORTANT
A proton and an electron both moving with the same velocity 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
Under the influence of a uniform magnetic field, a charged particle is moving in a circle of radius with constant speed . The time period of the motion

MEDIUM
12th Gujarat Board
IMPORTANT
An electron having mass and charge moves in a circular path of radius with a velocity in a magnetic field. Strength of magnetic field is

MEDIUM
12th Gujarat Board
IMPORTANT
Two long straight wires are set parallel to each other. Each carries a current in the same direction and separation between them is . Intensity of magnetic field midway between them is

MEDIUM
12th Gujarat Board
IMPORTANT
A moving coil galvanometer has a coil of effective area and number of turns . The magnetic field is radial. If a current is passed through the coil, the torque acting on the coil is

HARD
12th Gujarat Board
IMPORTANT
A square coil of side consists of and carries a current of . The coil is suspended vertically, and the normal to the plane of the coil makes an angle of with the direction of a uniform horizontal magnetic field of magnitude . What is the magnitude of torque experienced by the coil.

MEDIUM
12th Gujarat Board
IMPORTANT
A circular coil of turns and radius is placed in a uniform magnetic field of normal to the plane of the coil. If the current in the coil is , what is the total torque on the coil?

MEDIUM
12th Gujarat Board
IMPORTANT
A circular coil of turns and radius carrying a current of is suspended vertically in a uniform horizontal magnetic field of magnitude . The field lines make an angle of with the normal of the coil. Calculate the magnitude of the counter torque that must be applied to prevent the coil from turning.
