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Lab: Circuit Design — Unit test Answers

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Which is the best procedure to make a permanent magnet?

A
placing a magnetically hard material in a weak magnetic field
B
placing a magnetically hard material in a strong magnetic field
C
placing a magnetically soft material in a weak magnetic field
D
placing a magnetically soft material in a strong magnetic field
24
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Julia produces a 2 mA current by moving the south pole of a bar magnet into a solenoid. The solenoid contains 150 loops of wire.Which change should Julia make to generate a larger current?

A
moving the magnet slower
B
using more loops of wire in the coil
C
using the north pole of the magnet
D
setting the magnet down in the solenoid
25

How does the north pole of a magnet respond to the poles of other magnets?

A
It attracts both north and south poles.
B
It repels both north and south poles.
C
It attracts the north pole and repels the south pole.
D
It attracts the south pole and repels the north pole.

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