The diagrams show a current-carrying wire with an arrow in the direction of the current. Which diagram shows the magnetic field produced by the current?
A student investigates electromagnetic induction. She moves the N pole of a magnet quickly towards a coil of wire. There is a reading on the galvanometer.
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Question 2
2.
A student investigates electromagnetic induction. She moves the N pole of a magnet quickly towards a coil of wire. There is a reading on the galvanometer.
What can she do to get a bigger reading?
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Question 3
3.
This magnet is removed from the coil.
Which option is correct?
In the experiment below, the effect on a current-carrying conductor in an external magnetic field is studied.
The conductor experiences a force upwards and moves in the direction of the arrow.
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Question 4
4.
What is the direction of the current?
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Question 5
5.
What is the polarity of the magnet?
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Question 6
6.
Consider the following circuit. The battery has negligible internal resistance.
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Question 7
7.
When the switch is closed, what happens to the total resistance in the circuit?
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Question 8
8.
When the switch is closed, the reading on the voltmeter will ....
Consider the following circuit. The battery has negligible internal resistance. You can assume the resistors are identical.
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Question 9
9.
When the switch is closed, what happens to the total resistance in the circuit?
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Question 10
10.
When the switch is closed, what happens to the reading on the ammeter?