Activity 4: Magnetism: True/False statements (learner)

Decide if the following statements are true or false. Put T or F in the right hand column. Magnetic fields exist around current carrying conductors.

• True

• False

• Sometimes

• Never around superconductors

Decide if the following statements are true or false. Put T or F in the right hand column. The force acting upon a conductor is indirectly proportional to the magnetic flux density.

• True

• False

Decide if the following statements are true or false. Put T or F in the right hand column. An e.m.f. is induced into a conductor if it is moved across a magnetic field.

• True

• False

Decide if the following statements are true or false. Put T or F in the right hand column. The waveform produced from a conductor rotated between magnetic poles of an alternator is regarded as sinusoidal.

• True

• False

Decide if the following statements are true or false. Put T or F in the right hand column. Frequency relates to the size of the waveform produced by an alternator.

• True

• False

Decide if the following statements are true or false. Put T or F in the right hand column. Two conductors placed side by side, with current flowing in the same direction, would have a force of attraction between them.

• True

• False

Decide if the following statements are true or false. Put T or F in the right hand column. An effect of passing current through a conductor is heat.

• True

• False

Decide if the following statements are true or false. Put T or F in the right hand column. EMF generated in a conductor is directly proportional to its length within the magnetic field.

• True

• False

In an alternator, the greater the rate of rotation will result in a decrease in frequency.

• True

• False

Decide if the following statements are true or false. Put T or F in the right hand column. In alternators the rotating parts are magnets.

• True

• False