1. The north pole of a magnet experiences a force to the north. What is the logi
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Question
1. The north pole of a magnet experiences a force to the north. What is the logical consequence of this?
a) At the Earth's north geographic pole there is no magnetic pole.
b) At the Earth's north geographic pole is the Earth's south magnetic pole
c) At the Earth's north geographic pole is the Earth's north magnetic pole
d) The premise is false--it's the SOUTH pole of a magnet that points north
2. Consider an ordinary bar magnet with a north pole and a south pole. If you break that magnet exactly in half in an attempt to separate the poles, what do you get?
a) Two weaker bar magnets, one with two north poles and the other with two south poles
b) The piece containing the original north pole becomes the new bar magnet while the piece broken off is demagnetized
c) A separate north pole and south pole
d) Two weaker bar magnets, each with its own north pole and south pole
3. A charged particle moves through a uniform magnetic field. Which of the following is true about the magnetic force acting on the charge?
A) Assuming it's non-zero, the magnetic force is perpendicular to the direction of the motion of the charge.
B) Assuming it's non-zero, the magnetic force is parallel to the direction of the motion of the charge.
C) Assuming it's non-zero, the magnetic force is directed at an angle exactly midway between the direction of the field and the direction of the motion of the charge.
D) Assuming it's non-zero, the magnetic force is parallel to the direction of the magnetic field.
Explanation / Answer
Since the opposite poles attract and similar repel henc the direction in which north of bar magnet directed will have Earth magnetic south while geometric north. Option (b)
(2) (d) because magnetic monopoles always come in pair which are opposite in nature.
(3) Because the magnetic force is cross product of velocity and magnetic field hence option (A)
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