Chapter 21 - Magnetic Forces and Magnetic Fields

Question 1

What direction is the magnetic force acting on a moving charge?

Answer 1

perpendicular to its velocity and magnetic field.

Question 2

Explain Right Hand Rule #1

Answer 2

Right-Hand Rule No. 1: Extend the right hand so the fingers point along the direction of the magnetic field
B→ and the thumb points along the velocity
v→ of the charge. The palm of the hand then faces in the direction of the magnetic force
F→ that acts on a positive charge.

Question 3

What is the SI unit for magnetic field?

Answer 3

T

Question 4

Does the magnetic force do work on a moving charge? Why or why not?

Answer 4

No, because the direction of the force is always perpendicular to the motion of the particle.

Question 5

What is right hand rule #2?

Answer 5

Right-Hand Rule No. 2: Curl the fingers of the right hand into the shape of a half-circle. Point the thumb in the direction of the conventional current I, and the tips of the fingers will point in the direction of the magnetic field
B→.