Magnetism Final

Question 1

What do magnetic field lines show and how do you draw them?

Answer 1

the lines go from north to south and negatie to positive.

Question 2

What is a magnetic domain and how do they make material magnetic?

Answer 2

A magnetic domain is region in which the magnetic fields of atoms are grouped together and aligned.

Question 3

What is the difference between the geographic and magnetic poles?

Answer 3

The geographic poles; which are the points on the earth’s surface defining the axis of the earth’s rotation. The geographic poles are fixed ansd stable.
- The magnetic poles; which are definde where the earth’s magnetic field is perpindicular to the earth’s surface. At the north magnetic pole, the south end of a freely moving compass needle would point straight down. Because of drift in the earth’s magnetic field, the magnetic pole slowly drifts in position

Question 4

How does electricity cause magnetism?

Answer 4

Each electron is surrounded by a force called an electric field. When an electron moves, it creates a second field—a magnetic field. When electrons are made to flow in a current through a conductor

Question 5

What is the difference between a generator and a motor?

Answer 5

A motor is an electro magnetic device that converts electrical energy into rotating mechanical force. So you supply electricity to it and it will give you mechanical force as the output. A generator is just the opposite It converts mechanical energy to electrical energy.

Question 6

What does a capacitor do?

Answer 6

A capacitor is an electrical device that can store energy in the electric field between a pair of closely spaced conductors (called ‘plates’).

Question 7

How do you increase the strength of a solenoid?

Answer 7

1. By increasing number of turn.2. By increasing amount of current.3. By binding the solenoid in magnetic string.

Question 8

How do you increase the amount of current created by a generator?

Answer 8

add more current