Quiz about Quiz 8: Magnetism

Question 1

What is the relationship between electricity and magnetism?

Accepted Answer

They are intimately related

Answer

They are unrelated

Answer

They are opposites

Answer

They have no connection

Question 2

What are magnetic poles?

Accepted Answer

Regions on a magnet where the magnetic field is strongest

Answer

Regions on a magnet where the magnetic field is weakest

Answer

Regions on a magnet where the magnetic field is absent

Answer

Regions on a magnet where the magnetic field changes direction

Question 3

How do magnetic poles interact?

Accepted Answer

They can attract or repel each other

Answer

They always attract each other

Answer

They always repel each other

Answer

They have no interaction

Question 4

What is the behavior of magnetic forces between poles?

Accepted Answer

They decrease with distance

Answer

They increase with distance

Answer

They remain constant with distance

Answer

They have no relation to distance

Question 5

What creates a magnetic field?

Accepted Answer

Moving Charges

Answer

Protons

Answer

Neutrons

Answer

Electrons

Question 6

How is a magnetic field represented?

Accepted Answer

By magnetic field lines that form closed loops

Answer

By electric field lines emanating from one point and landing on another

Answer

By gravitational field lines directed towards a massive object

Question 7

What creates a stronger magnetic field?

Accepted Answer

Fast-moving electrons

Answer

Stationary electrons

Answer

Fast-moving neutrons

Question 8

What are magnetic domains?

Accepted Answer

Clusters of atoms in a material w/aligned magnetic fields

Answer

Clusters of unaligned atoms in a material

Answer

Clusters of charged particles in a material

Answer

Clusters of magnets in a material

Question 9

How can a piece of metal be turned into a magnet?

Accepted Answer

By introducing a strong magnetic field under the right temperature conditions

Answer

By introducing a strong electric field regardless of temperature

Answer

By introducing a strong gravitational field

Question 10

What determines the strength of a magnet?

Accepted Answer

Both the number and orientation of magnetic domains

Answer

The number of magnetic domains

Answer

The orientation of magnetic domains

Answer

Neither the number nor orientation of magnetic domains

Question 11

What happens when a magnet is cut in half?

Accepted Answer

Each piece is a magnet

Answer

The magnet loses its magnetic properties

Answer

The magnet becomes stronger

Answer

The magnet becomes weaker

Question 12

What is the direction of magnetic field lines?

Accepted Answer

From north to south

Answer

From south to north

Answer

From east to west

Answer

From west to east

Question 13

In 1831 who discovered electromagnetic induction?

Accepted Answer

Michael Faraday

Answer

Thomas Edison

Answer

Nikola Tesla

Question 14

Can you produce current in a wire with a magnet that is sitting still?

Accepted Answer

Only if there is a change in the magnetic field strength

Answer

Yes; having a magnet near a wire is enough to excite the electrons

Answer

No; magnets cannot create electricity

Question 15

A coil spins in a magnetic field. Of the following

which causes an increase in the induced EMF in

the coil?

Accepted Answer

Spinning the coil faster

Answer

Removing the coil from the magnetic field

Answer

Keeping the flux at a constant rate

Answer

Decreasing the number of turns of wire in

the coil

Question 16

Voltage can be induced in a wire by

Accepted Answer

d. all of these

Answer

a. moving the wire near a magnet.

Answer

b. moving a magnet near the wire.

Answer

c. changing the current in a nearby wire.

Question 17

What would happen if I move a bar magnet in and out of a coil of copper wire?

Accepted Answer

Electric current will flow through the wire

Answer

Electric current would disappear

Answer

The magnet would explode

Answer

It would produce a gravitational field

Question 18

A magnet can move in a coil of wire to produce electricity in which system?

Accepted Answer

Generator

Answer

Motor

Answer

Magnet

Answer

Transformer

Question 19

A magnetic field exerts a force on a charged particle:

Accepted Answer

if the particle is moving across the field lines

Answer

always

Answer

never

Answer

if the particle is moving along the field lines

Question 20

A student moves a magnet into a coil of wire as shown in the diagram. The coil of wire is connected to a sensitive ammeter.

Accepted Answer

all of the above

Answer

increasing the number of turns on the coil

Answer

increasing the speed of the magnet

Answer

increasing the strength of the magnet

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