U7.3 – Magnetic Fields & Forces

3

Magnetic Fields and Forces

1 / 13

Which way do magnetic field lines run?

2 / 13

Select the false statement:

3 / 13

Look at these diagrams, which current carrying wire will have the largest magnetic field?

4 / 13

Which diagram(s) have a magnetic field that has a clockwise direction?

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Which diagram has the largest magnetic flux?

6 / 13

A current carrying wire is placed in a magnetic field as shown in this diagram. Which way is the resultant force acting?

7 / 13

The current is now reversed, which way is the resultant force now acting?

8 / 13

A 2.5N magnetic force acts on a 475m wire that is perpendicular to a 0.50 T magnetic field. Calculate the current in the wire.

9 / 13

There is a magnetic force of 2N on a 15 cm segment of wire carrying 4.5A. Calculate magnetic flux density?

10 / 13

In which diagram is no resultant force experienced?

11 / 13

A 23 cm wire carrying 3 mA of current is placed at an angle of 47° to the field lines of a uniform magnetic field of with a magnetic flux density of 0.75 T. Calculate the resultant force experienced by the wire.

12 / 13

A wire has a radius of 2 mm, a mass of 14g and a density of 8960 kg m-3 and carries a current of 2.5 A. Calculate the force experience by the wire when it is placed at right angles to a horizontal uniform magnetic field of flux density 4.3 x 10-4 T.

13 / 13

An Alpha particle is travelling through a uniform magnetic field of flux density 4.3x10-3 T at an angle of 32° to the field lines. There is a force of 1.76 x10-15 N acting on the Alpha particle. Calculate the velocity of the Alpha particle.

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