Electromagnetism Quiz
Quiz by Pamela Chinik
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- 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 - 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 - 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 - 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 - 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
