Question

A horizontal compass is placed 0.26 m due south from a straight vertical wire carrying a 42 A current downward. Assume the horizontal component of the Earth's field at this point is 0.45E-4 T. In what direction does the compass needle point at this location? Give your answer as a decimal fraction of degrees west of north.

Answer #1

A horizontal compass is held on the surface of the Earth
directly over a buried powerline with a current of 200 A heading
due south. The compass is 5 m above the powerline. In what
direction does the compass needle point at this location andwhat is
the magnitude of the total magnetic field at this point? Assume the
horizontal component of the Earth’s field at this point is 0.45 x
10‐4 T and is directed due north.

A straight, vertical wire carries a current of 2.30 A downward
in a region between the poles of a large superconducting
electromagnet, where the magnetic field has a magnitude of B =
0.550 T and is horizontal.
A) What is the magnitude of the magnetic force on a 1.00 cm
section of the wire that is in this uniform magnetic field, if the
magnetic field direction is east? Express your answer with the
appropriate units.
B) What is the direction...

In Oersted's experiment, suppose that the compass was 0.16 m
from the current-carrying wire. If a magnetic field of one third
the Earth's magnetic field of 5.0×10?5T was required to give a
noticeable deflection of the compass needle, what current must the
wire have carried?

A long horizontal wire carries 26.0 A of current due north. The
Earth's field 21.0 cm due west of the wire points north but
downward, 43 degrees below the horizontal, and has magnitude of
5.0×10−5 T.
What is the magnitude of the net magnetic field 21.0 cm due west
of the wire?
What is the angle below the horizontal of the net magnetic field
21.0 cm due west of the wire?

A straight, vertical wire carries a current of 2.30 A downward
in a region between the poles of a large superconducting
electromagnet, where the magnetic field has a magnitude of B =
0.578 T and is horizontal.
Part A
What is the magnitude of the magnetic force on a 1.00 cmcm
section of the wire that is in this uniform magnetic field, if the
magnetic field direction is east?
Part B
What is the direction of this magnetic force?
south...

A straight, vertical wire carries a current of 2.10 A downward
in a region between the poles of a large superconducting
electromagnet, where the magnetic field has a magnitude of B =
0.562 T and is horizontal. Part E What is the magnitude of the
magnetic force on a 1.00 cm section of the wire that is in this
uniform magnetic field, if the magnetic field direction is 30.0 ∘
south of west? ANSWER= 1.18×10−2 N. Part F What is...

Lab Scenario:
You don't have a current meter in your underequipped lab.
So you make one out of a compass.
The wire you want to measure the current in is aligned with the
North South line.
You place your compass directly under the wire at a distance of
10cm from the wire.
With no current flowing, the compass needle points due
north.
When you turn on the current, the compass needle points 5
degrees west of north.
You now have...

A long, straight wire carrying a current I1 is placed on a
horizontal table in front of you and the direction of the current
points +x axis. The magnetic field produced by the current I1 at a
point 5 cm above the wire is 0.2 T. A second parallel wire carrying
a current I2 = 3I1 is placed 10 cm above the first wire and the
direction of the current also points +x axis. What is the direction
of the...

A long horizontal wire carries 15.0 AA of current due north.
A.What is the absolute value of the net magnetic field 21.0 cmcm
due west of the wire if the Earth's field there points north but
downward, 37 ∘∘ below the horizontal, and has magnitude 5.0
×10−5T×10−5T?
B. What is the angle of the net magnetic field 21.0 cmcm due
west of the wire if the Earth's field there points north but
downward, 37 ∘∘ below the horizontal, and has...

At a point on the Earth’s surface the magnetic field has a
horizontal component due north of 1.8 ́ 10-5 T and a vertical
component downwards of 5.5 ́ 10-5 T.
(i) Draw a diagram.
(ii) Calculate the force on a 1.5 m length of wire carrying a
current of 13 A when the wire is held vertically with the current
flowing downwards.
(iii) Calculate the force when the wire is horizontal with the
current flowing west to east.

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