If you take a bar magnet with both N & S poles and cut it in half, you get 2. A
ID: 1448576 • Letter: I
Question
If you take a bar magnet with both N & S poles and cut it in half, you get
2.
A magnetic dipole (such as a compass needle) wants to
3.
Magnetic field lines
4.
If you see the symbols x and o (or a dot), these mean:
5.
Somewhat Near the earth's north pole (for rotation) is the Earth's
6.
You are looking down a wire that has current going directly away from you. Its magnetic field lines would be best described, from your perspective, as
7.
You are a distance D from a wire carrying current. You then move to a distance 2D. You now experience
8.
Magnetic fields exert forces on:
9.
What can you say about the direction of the magnetic field (B), the magnetic force (F) on charge, and the velocity (v) of a point charge?
10.
The right-hand-rule for magnetic force given in the text book has:
11.
A charged particle in a uniform magnetic field:
If you take a bar magnet with both N & S poles and cut it in half, you get
A) one magnet with an N pole only, one magnet with an S pole onlyB) two magnets, each with N & S poles
C) two non-magnets
2.
A magnetic dipole (such as a compass needle) wants to
A) align with the magnetic fieldB) align with the electric field
C) lie opposite the magnetic field
D) lie opposite the electric field
E) be perpendicular to the magnetic field
F) be perpendicular to the electric field
3.
Magnetic field lines
A) exit + charges and enter - chargesB) exit N poles and enter S poles
C) are always perpendicular to the E field lines
D) are always perpendicular to the equipotentials
E) exit S poles and enter N poles
F) exit - charges and enter + charges
4.
If you see the symbols x and o (or a dot), these mean:
A) x means into the page, o means out of the pageB) x means out of the page, o means into the page
C) x means left on the page, o means right on the page
D) x means up on the page, o means down on the page
E) x means right on the page, o means left on the page
F) you're looking at a tic-tac-toe game, not a physics textbook!
5.
Somewhat Near the earth's north pole (for rotation) is the Earth's
A) South magnetic poleB) North magnetic pole
C) + end of its electric dipole
D) - end of its electric dipole
6.
You are looking down a wire that has current going directly away from you. Its magnetic field lines would be best described, from your perspective, as
A) circular & clockwiseB) circular & counterclockwise
C) radially outwards from the wire
D) radially inwards towards the wire
E) directly towards you
F) directly away from you
7.
You are a distance D from a wire carrying current. You then move to a distance 2D. You now experience
A) twice the B field as beforeB) half the B field as before
C) the same B field as before
D) four times the B field as before
E) one-fourth the B field as before
8.
Magnetic fields exert forces on:
A) electric chargesB) moving electric charges
C) electric current
D) electric dipoles
9.
What can you say about the direction of the magnetic field (B), the magnetic force (F) on charge, and the velocity (v) of a point charge?
A) F is perpendicular to both B and vB) B is perpendicular to F and v
C) v is perpendicular to B and F
D) F is parallel to B
E) v is parallel to B
F) v is parallel to F
10.
The right-hand-rule for magnetic force given in the text book has:
A) thumb is v, index finger is B, middle finger is FB) thumb is B, index finger is F, middle finger is v
C) thumb is F, index finger is v, middle finger is B
D) thumb is v, index finger is F, middle finger is B
E) thumb is B, index finger is v, middle finger is F
F) thumb is F, index finger is B, middle finger is v
11.
A charged particle in a uniform magnetic field:
A) accelerates in a straight line along the B fieldB) moves in a straight line perpendicular to the B field
C) moves in a circle perpendicular to the B field
D) moves in a circle parallel to the B field
Explanation / Answer
1.
single pole of magnet doesn't exist
Answer: B) two magnets, each with N & S poles
2.
A) align with the magnetic field
this is property of magnetic needle
3.
B) exit N poles and enter S poles
magnetic field is due to magnet and not charges here
4.
A) x means into the page, o means out of the page
5.
A) South magnetic pole
6.
B) circular & clockwise
It can be found by right hand thumb rule
7.
B) half the B field as before
B = miuo*I/2*pi*d
B is inversely proportional to d
8.
B) moving electric charges
9.
A) F is perpendicular to both B and v
10.
F) thumb is F, index finger is B, middle finger is v
I am allowed to answer only 4 parts at a time