1-3 Magnitism

Question 1

NEMA

Answer 1

National Electrical Manufacturers Association

Question 2

IEC

Answer 2

International Electrotechnical Comission

Question 3

A power circuit is dictated by?

Answer 3

A control circuit

Question 4

What is Flux?

Answer 4

Combined lines of force

Question 5

277 and 480 Volt wire colors?
(US NEC)

Answer 5

Brown (1), orange (2), yellow (3)

Question 6

Current and voltage are?

Answer 6

Proportional

Question 7

How to change motor rotation?

Answer 7

Change the north and South Pole (Polarity)

Question 8

How does a motor starter work?

Answer 8

Coil needs current (magnetism)

Question 9

What’s a magnet?

Answer 9

A substance that produces a magnetic field and attracts iron

Question 10

What’s a permanent magnet

Answer 10

A magnet that can retain its magnetism after the magnetizing force has been removed

Question 11

What’s a temporary magnet?

Answer 11

A magnet that retains only trace amounts of magnetism after the magnetizing force has been removed

Question 12

What is Electromagnetism?

Answer 12

The magnetism produced when electric current passes through a conductor

Question 13

What are the 3 ways to increase the strength of the magnetic field in a coil (magnetism)?

Answer 13

1. Increase the amount of current by increasing the voltage
2. Increase the number of turns in the coil
3. Insert an iron core through the coil.