EASY
AS and A Level
IMPORTANT
Earn 100

A current-carrying wire is placed in a uniform magnetic field.

(a) Describe how the wire should be placed to experience the
maximum force due to the magnetic field.

Important Questions on Magnetic Fields and Electromagnetism

EASY
AS and A Level
IMPORTANT

A current-carrying wire is placed in a uniform magnetic field.

(b) Describe how the wire should be placed to experience no force due to the magnetic field .

EASY
AS and A Level
IMPORTANT

A current-carrying conductor placed at right angles to a uniform magnetic field experiences a force of4.70×10-3N. Determine the force on the wire when, separately:

(a) the current in the wire is increased by a factor of3.0

EASY
AS and A Level
IMPORTANT

A current-carrying conductor placed at right angles to a uniform magnetic field experiences a force of4.70×10-3N. Determine the force on the wire when, separately:

(b) the magne tic flux density is halved

EASY
AS and A Level
IMPORTANT

A current-carrying conductor placed at right angles to a uniform magnetic field experiences a force of4.70×10-3N. Determine the force on the wire when, separately:

(c) the length of the wire in the magnetic field is reduced to 40%
of its original length.

EASY
AS and A Level
IMPORTANT

A copper wire carrying a current of1.2A has 3.0cm of its length placed in a uniform magnetic field, as shown.

Question Image

The force experienced by the wire is 3.8×10-3N when the angle between the wire and the magnetic field is50°.

(a) Calculate the magnetic flux density.

EASY
AS and A Level
IMPORTANT

A copper wire carrying a current of 1.2A has 3.0cm of its length placed in a uniform magnetic field, as shown.

Question Image

The force experienced by the wire is3.8×10-3Nwhen the angle between
the wire and the magnetic field is50°.

(b) State the direction of the force experienced by the wire.

EASY
AS and A Level
IMPORTANT

This diagram shows a view from above of two long, parallel strips of aluminium foil,A and B, carrying a current downwards into the paper.

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(a) On a copy of the diagram, draw the magnetic field around and between the two strips.

EASY
AS and A Level
IMPORTANT

This diagram shows a view from above of two long, parallel strips of aluminium foil, A and B, carrying a current downwards into the paper.

Question Image

(b) State and explain the direction of the forces caused by the current in the strips.