7.23.F - Quiz: Electricity & Magnets

Question 1

When drawing a magnetic field around a bar magnet, the lines are drawn closer together where the magnetic field is ___________.
weaker
appearing
stronger
disappearing

Answer 1

stronger

Question 2

If the bar magnet on the left were broken in half, what statement correctly predicts how the two halves of the magnet would react to the magnet on the right?

The right side of both halves would be attracted to the magnet on the right since the south pole of each half would be facing the north pole of the other magnet.
Neither half of the broken magnet would be attracted to the magnet on the right because a magnet must have two poles.
The two halves of the broken magnet would be attracted to each other, but neither would be attracted to the magnet on the right.
Only the right side of the broken magnet would be attracted to the magnet on the right since it contains the south-oriented magnetic domains.

Answer 2

The right side of both halves would be attracted to the magnet on the right since the south pole of each half would be facing the north pole of the other magnet.

Question 3

Ampere discovered that parallel electric conductors attracted each other when the electric current running through them was __________.
flowing in the same direction
going through one wire which was one meter away from the other wire
flowing through copper tubes
flowing in opposite directions

Answer 3

flowing in the same direction

Question 4

When drawing a magnetic field around a bar magnet, the lines are drawn closer together where the magnetic field is __________.
nonexistent
darker
stronger
weaker

Answer 4

stronger

Question 5

Before satellites and radar, sailors used maps with longitude and latitude lines and _______ to plot their travels across the oceans.
stars
experience
currents
winds

Answer 5

stars

Question 6

What country is known to have used a ladle-and-basin, lodestone, south-pointing compass?
Italy
Korea
China
Japan

Answer 6

China

Question 7

Michael Faraday believed that _____________.
Scripture could be adjusted with new scientific discoveries
science should be debated
Scripture and science come from the same Maker
all scientists of his time were Christians

Answer 7

Scripture and science come from the same Maker

Question 8

A galvanometer shows ____________.
a current passing through the circuit
the emfs in the battery
how many coils are in the generator
the number of amps used

Answer 8

a current passing through the circuit

Question 9

How many volts of electricity flow through a Van de Graaff generator?
175,000
150,000
100,000
200,000

Answer 9

200,000

Question 10

Which is most likely to kill you?
high voltage
a low number of amps
a high number of EMFs
high current

Answer 10

high current

Question 11

Which change would result in a stronger electromagnet?

Substituting another metal for the iron core
Increasing the voltage of the battery
Decreasing the number of coils around the iron core.
Reducing the number of batteries

Answer 11

Increasing the voltage of the battery

Question 12

Bob and Sarah build an electromagnet by wrapping a wire around a nail and connecting the wire to both terminals of a battery. When they test the electromagnet, it can pick up six paper clips. Their teacher wants all groups to pick up at least 10 paper clips. What revisions could Bob and Sarah make to increase the number of paper clips their electromagnet picks up?
Spread the loops of the wire apart on the nail so they do not touch
Increase the number of loops of wire around the nail
Remove the nail from the center of the wire
Increase the link of the wire

Answer 12

Increase the number of loops of wire around the nail