Electricity

Question 1

What is the current?

Answer 1

• the charge transferred per unit time.

Question 2

What is direct current?

Answer 2

• when current flows in one direction only at all times.

Question 3

What is alternating current?

Answer 3

• when the current changes direction every fraction of a second.

Question 4

What is another name for voltage?

Answer 4

• potential difference.

Question 5

What is the voltage of a supply?

Answer 5

• a measure of the energy given to each columb of charge passing through a supply.

Question 6

How does temperature effect resistance?

Answer 6

• when the temperature increases the resistance in an electrical conductor increases.

Question 7

How do wire length effect resistance?

Answer 7

• the longer the wire the greater the resistance.

Question 8

What is electrical power?

Answer 8

• the rate at which energy is transferred.

Question 9

What is a fuse?

Answer 9

• a safety device that prevents too much current flowing in a circuit, by breaking to prevent over heating.

Question 10

What is a suitable fuse rating?

Answer 10

• 3A