Electromagnetism Quiz

Quiz by Pamela Chinik

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17 questions
• Q1

Two students make electromagnets in Physics class. Farah's electromagnet has 20 loops in the coil. Willow's electromagnet has 50 loops in the coil. If they are both connected to 9-V batteries, which electromagnet will have a stronger magnetic field?

Both electromagnets will have the same strength.

Farah's electromagnet

Willow's electromagnet

120s
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• Q2

How does the magnetic field around a current-carrying wire increase?

The current needs to decrease to increase the magnetic field.

The resistance of the wire needs to increase to increase the magnetic field.

The current needs to increase to increase the magnetic field.

The current needs to reverse direction to increase the magnetic field.

120s
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• Q3

If Yaseen were to replace the 12-V battery in his electromagnet with a 9-V battery, what would he notice when he tried to pick up some nails?

The magnetic field of the electromagnet would increase, so it would pick up less nails.

The magnetic field of the electromagnet would increase, so it would pick up more nails.

The magnetic field of the electromagnet would decrease, so it would pick up less nails.

The magnetic field of the electromagnet would decrease, so it would pick up more nails.

120s
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• Q4

Students in the lab do not have access to an ammeter. What else could they do to test whether current is flowing through a wire?

Use a compass to try and detect the magnetic field around the wire.

See if they get shocked when they touch the wire.

Touch a light bulb to the wire and see if it lights up.

See if a paperclip sticks to the wire.

120s
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• Q5

We can use the right-hand rule to determine the direction of the magnetic field around a current-carrying wire. Which statement is correct concerning magnetic field direction?

When the direction of the current reverses - the magnetic field will also reverse direction.

When the direction of the current reverses - the magnetic field will remain unaffected.

When the direction of the current reverses - the magnetic field will decrease.

When the direction of the current reverses - the magnetic field will increase.

120s
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• Q6

The smallest clusters of atoms with aligned electron spins are ________________; these will be _____________ in a permanent magnet.

domains: aligned in the same direction

poles:  randomly oriented

domains: randomly oriented

poles:  aligned in the same direction

120s
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• Q7

Below is a list of motor processes that explain its function. Place them in the correct order.

120s
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• Q8

What is the correct energy conversion for a motor?

Magnetic to nuclear energy.

Mechanical to electrical energy.

Electrical to mechanical (potential) energy.

Electrical to mechanical (kinetic) energy.

120s
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• Q9

What is the best explanation for the existence of magnetic fields?

Iron is the only substance that has a magnetic field.

Movement of electrical  charges creates magnetic fields.

Gravitational fields create magnetic fields.

High voltage is the only way to create magnetic fields.

120s
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• Q10

Two magnets interact as seen in the image. Based on the magnetic field lines drawn - what poles are interacting?

South on the left and South on the right.

North on the left and North on the right.

South on the left and North on the right.

North on the left and South on the right.

120s
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• Q11

How can you create a current in a wire that is NOT attached to a battery or voltage source?

Wave a magnet around next to it.

Loop it into a coil and rotate it around in the air.

Place a compass next to the wire.

Loop it into a coil and push a magnet in and out of the loop.

120s
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• Q12

What is the energy conversion for a generator?

Electrical to magnetic energy.

Electrical to mechanical (kinetic) energy.

Mechanical (potential) to electrical energy.

Mechanical (kinetic) to electrical energy

120s
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• Q13

Below are the explanation for how a generator works. Place these statements in the correct order.

120s
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• Q14

Use the image to determine the direction of the magnetic field on the RIGHT SIDE of the wire.

Left

Out of the screen

Down

Into the screen

120s
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• Q15

Which of the properties listed below are only true for magnetic poles and not true for electric charges?

Opposites attract.

Cannot be separated from one another.

Likes repel.

Forces act over a distance and don't have to be in contact.

120s
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• Q16

Which of the coils in this Faraday Electromagnetic Induction demo would produce the greatest current if the magnet were moved the same way in each one?

Both coils would induce the same current if the same magnet were used.

The coil on the bottom with more loops will induce more current.

The coil on the top with less loops would induce more current.

120s
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• Q17

Two Physics students try to master the art of electromagnetic induction in a lab. Seamus moves his magnet in and out of the coil of wire 3 times every second. Gabe moves his magnet in and out of the coil of wire 2 times every second. What will the results be?

Gabriel will see a brighter light bulb because he induced more current

Seamus will see a brighter light bulb because he induced more current.

They will both see the same brightness bulb because the speed of the magnet does not effect induced current.

120s
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