Chapter 5.4

Question 1

Magnetic field

Answer 1

The field around a magnet

Question 2

Magnetic field lines

Answer 2

Imaginary curves that are tangent to the magnetic field

Question 3

Right hand grip rule around a straight wire

Answer 3

Grip the wire with the fingers of the right hand in such a way that the thumb points in the direction of the current. The direction in which the fingers curl is the direction of the flow of the magnetic field vectors

Question 4

When is there no magnetic force on a moving charge?

Answer 4

When the charge moves along the field direction

Question 5

Magnetic force

Answer 5

The force felt by an electric charge when moving in a region of magnetic field

Question 6

Magnetic flux density formula

Answer 6

B = F/(qvsin(theta))

Question 7

Magnetic force experienced by a charge in a magnetic field formula

Answer 7

F = qvBsin(theta)
B = magnetic flux density

Question 8

Formula for the magnetic force on a current carrying wire

Answer 8

F = BILsin(theta)
L = length of wire in region of field

Question 9

What is the work done by a magnetic force that is normal to the velocity of a charge?

Answer 9

Zero

Question 10

Ampere definition

Answer 10

The magnetic force between two parallel wires. If the force on a 1m length of two wires are 1m apart and carrying equal currents of 2*10^(-7)N, then the current in each wire is 1A