EL0021 - Magnetic Devices

Draw the conventional direction of flux

Answer explanation

The conventional direction of flux is from North to South

A magnet has two poles (north and south pole), so named because a magnet, if allowed to move freely, aligns itself so its north pole points to the Earth’s magnetic North Pole

• True

• False

The two magnets will ​ (a)   each other once brought into close proximity

• Repel
• Attract

• Nothing

Organize these options into the right categories

Groups:

(a) Ferromagnetic

,

(b) Paramagnetic

,

(c) Diamagnetic

• Mercury

• Oxygen

• Iron

• Aluminium

• Platinum

• Steel

• Wood

• Copper

Based on the direction of current flow, the direction of the magnetic field would be:

• Clockwise around the conductor

• Anticlockwise around the conductor

A magnet can be created by exposing a ​ (a)   material to a strong magnetic field

• ferromagnetic
• paramagnetic
• diamagnetic

When a steel bar is brought close to a magnet, the steel bar will have magnetic poles induced in it. Label both poles on the bar magnet

a

b

North

South

The direction of current flow through the following conductors is shown by arrows. Label each conductor to indicate the standard convention of showing direction of current flow.

a

b

Away

Towards

Using the Right-Hand Solenoid Rule, show the poles of the following electromagnetic coil

a

b

South

North