North в в West (b+) F down (a) (b) Figure 22.18 A positively charged object moving due west in a region where the Earth's magnetic field is due north experiences a force that is straight down as shown. A negative charge moving in the same direction would feel a force straight up.

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Chapter24: Magnetic Fields
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With the exception of compasses, you seldom see or personally experience forces due to the Earth’s small magnetic field.
To illustrate this, suppose that in a physics lab you rub a glass rod with silk, placing a 20-nC positive charge on it. Calculate the force on the rod due to the Earth’s magnetic field, if you throw it with a horizontal velocity of 10 m/s due west in a place where the Earth’s field is due north parallel to the ground. (The direction of the force is determined with right hand rule 1 as shown.)

North
в
в
West
(b+)
F down
(a)
(b)
Figure 22.18 A positively charged object moving due west in a region where the Earth's magnetic field is due north experiences a force that is
straight down as shown. A negative charge moving in the same direction would feel a force straight up.
Transcribed Image Text:North в в West (b+) F down (a) (b) Figure 22.18 A positively charged object moving due west in a region where the Earth's magnetic field is due north experiences a force that is straight down as shown. A negative charge moving in the same direction would feel a force straight up.
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