I am having trouble figuring out this question:
Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located:
50 deg below due North
50 deg below due South
40 deg above due North
40 deg above due South
50 deg above due West
50 deg above due East
40 deg below due West
40 deg below due East
directly above
directly below
none of these choices
Part 2: Refer to the previous problem. An electron at point #1 is instantaneously traveling due North. Due only to the wire, the electron at #1 instantaneously accelerates:
East
West
North
South
directly up
directly down
50 deg N or West
50 deg S of East
none of the above
A soldier moved 3km north and then 3km west. What is his displacement
A car travels 12 km north from oakville, then 8.0 km westto springfield .what is the magnitude of the displacement of a helicopter that travels directly from oakville to springfield
To answer Part 1 of the question, we need to apply the right-hand rule for magnetic fields.
The right-hand rule states that if you point your thumb in the direction of the current, the curling of your fingers represents the direction of the magnetic field produced by the wire.
In this case, the wire carries a current due East, so if you point your right thumb towards the East, your fingers will curl in a counterclockwise direction.
Now, imagine standing at point #1 and looking towards the wire. The magnetic field will be directed at an angle of 40 degrees below due South.
To determine the direction of the wire from point #1, imagine that you are looking at a compass. The compass needle always points towards the North.
So, if you are standing at point #1 and the magnetic field is directed below due South, that means the wire must be located above due South.
Looking at the answer choices:
- 50 deg below due North: No, the wire is located above due South.
- 50 deg below due South: No, this would mean the wire is below due South.
- 40 deg above due North: No, the wire is above due South.
- 40 deg above due South: No, the wire is above due South.
- 50 deg above due West: No, the wire is above due South, not West.
- 50 deg above due East: No, the wire is above due South, not East.
- 40 deg below due West: No, the wire is above due South, not West.
- 40 deg below due East: No, the wire is above due South, not East.
- Directly above: Yes, this is the correct answer.
- Directly below: No, the wire is above due South.
- None of these choices: No, the correct answer is "directly above."
Now, let's move on to Part 2 of the question.
The wire carrying the current creates a magnetic field. When an electron moves through a magnetic field, it experiences a force in a direction perpendicular to its motion.
In this case, the electron is instantaneously traveling due North and the magnetic field is directed at 40 degrees below due South.
Since the electron is moving due North and the magnetic field is directed at an angle, the force on the electron will be in the direction perpendicular to both the North and the angle.
Using the right-hand rule again, if you point your right thumb towards the North and curl your fingers towards the angle below South, your fingers will end up pointing towards the West.
So, the electron at point #1 will instantaneously accelerate towards the West due to the wire.
Looking at the answer choices:
- East: No
- West: Yes, this is the correct answer.
- North: No
- South: No
- Directly up: No
- Directly down: No
- 50 deg N or West: No, the force is towards the West.
- 50 deg S of East: No
- None of the above: No, the correct answer is "West."
I hope this explanation helps you understand how to solve the problem!