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Quiz by , created more than 1 year ago

This quiz covers the topics of magnetic fields, magnetic flux density, magnetic flux, forces in magnetic fields and electromagnetic induction. It tests material learnt in the mind map on electromagnetism, and associated notes and mind maps.

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Electromagnetism: Quiz

Question 1 of 10

1

Magnetic Field Lines flow in which direction?

Select one of the following:

  • From the north pole to the south pole of a magnet.

  • From the south pole to the north pole of a magnet

  • From the north pole of a magnet to a north pole of another magnet

Explanation

Question 2 of 10

1

What is measured by the Magnetic Flux Density?

Select one of the following:

  • Size of the magnetic field

  • Strength of the magnetic field

  • Current flowing through the magnetic field

Explanation

Question 3 of 10

1

What is the unit of magnetic flux?

Select one of the following:

  • Tesla

  • Weber

  • Ampere

  • Volt

Explanation

Question 4 of 10

1

What is the formula for the force on a current-carrying conductor in a magnetic field?

Select one of the following:

  • F = ILB

  • F = qvB

  • F = ΦB

Explanation

Question 5 of 10

1

Lenz's law states that the magnitude of an emf induced by a changing magnetic flux is proportional to the rate of change of flux linking a circuit.

Select one of the following:

  • True
  • False

Explanation

Question 6 of 10

1

Which of the following electrical devices use the phenomenon of mutual induction?

Select one of the following:

  • Transformer

  • Inductor

  • Semiconductor

Explanation

Question 7 of 10

1

What energy conversion takes place in a generator?

Select one of the following:

  • Electrical to mechanical

  • Mechanical to heat

  • Mechanical to electrical

Explanation

Question 8 of 10

1

Which of the following objects use inductors?

Select one or more of the following:

  • Mobile phone chargers

  • Televisions

  • Dimmer switches in lighting

  • Power stations

  • Radios

Explanation

Question 9 of 10

1

Alternating current is a current whose direction reverses constantly.

Select one of the following:

  • True
  • False

Explanation

Question 10 of 10

1

The left hand rule is used in which scenario?

Select one of the following:

  • Direction of force on a current-carrying conductor in a magnetic field

  • Direction of magnetic field due to current

  • Magnitude of force on a current-carrying conductor in a magnetic field

Explanation

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