Consider a wire of length L = 0.30 m that runs north-south on a horizontal surface. There is a current of I = 0.50 A flowing north in the wire. (The rest of the circuit, which actually delivers this current, is not shown.) The Earth's magnetic field at this location has a magnitude of 0.50 gauss (or, in Sl units, 0.5 x 10-4 tesla) and points north and 38 degrees down from the horizontal, toward the ground. What is the size of the magnetic force on the wire due to the Earth's magnetic field? In considering the agreement of units, recall that 1 T 1 N/(A m).(Eigure 1) Express your answer in newtons to two significant figures.
Consider a wire of length L = 0.30 m that runs north-south on a horizontal surface. There is a current of I = 0.50 A flowing north in the wire. (The rest of the circuit, which actually delivers this current, is not shown.) The Earth's magnetic field at this location has a magnitude of 0.50 gauss (or, in Sl units, 0.5 x 10-4 tesla) and points north and 38 degrees down from the horizontal, toward the ground. What is the size of the magnetic force on the wire due to the Earth's magnetic field? In considering the agreement of units, recall that 1 T 1 N/(A m).(Eigure 1) Express your answer in newtons to two significant figures.
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
Transcribed Image Text:Learning Goal:
To understand the magnetic force on a straight current-
carrying wire in a uniform magnetic field.
Part A
Magnetic fields exert forces on moving charged
particles, whether those charges are moving
independently or are confined to a current-carrying
wire. The magnetic force F on an individual moving
charged particle depends on its velocity v and charge
q. In the case of a current-carrying wire, many charged
particles are simultaneously in motion, so the magnetic
force denends on the total current I and the lenath of
Consider a wire of length L = 0.30 m that runs north-south on a horizontal surface. There is a current of
I = 0.50 A flowing north in the wire. (The rest of the circuit, which actually delivers this current, is not
shown.) The Earth's magnetic field at this location has a magnitude of 0.50 gauss (or, in Sl units,
0.5 x 10-4 tesla) and points north and 38 degrees down from the horizontal, toward the ground. What
is the size of the magnetic force on the wire due to the Earth's magnetic field? In considering the
agreement of units, recall that 1T=1N/(A m).(Figure 1)
Figure
< 1 of 2
Express your answer in newtons to two significant figures.
?
N
Up
W +
S
Down
Part B

Transcribed Image Text:Part B
Now assume that a strong, uniform magnetic field of size 0.55 T pointing straight down is applied. What
is the size of the magnetic force on the wire due to this applied magnetic field? Ignore the effect of the
Earth's magnetic field.
Express your answer in newtons to two significant figures.
?
N
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