Physics 2.2.4

Question 1

What does AC stand for?

Answer 1

Alternating Current.

Question 2

What does DC stand for?

Answer 2

Direct Current.

Question 3

Define ‘Direct Current’:

Answer 3

A Current that is steady, constantly Flowing in the same Direction in a Circuit, from Positive to Negative.

Question 4

Describe the Potential Difference across a Cell in a DC Circuit.

Answer 4

The PD is in one Direction only.

Question 5

What Produces Direct Current? (2)

Answer 5

-Cells.
-Batteries.

Question 6

Define ‘Alternating Current’:

Answer 6

A Current that continuously changes its Direction, going back & forth around a Circuit.

Question 7

What does Direct Current look like on an Oscilloscope?

Answer 7

A Straight Line.

Question 8

What does Alternating Current look like on an Oscilloscope?

Answer 8

Oscillating Line.

Question 9

Define the ‘Frequency’ of an AC:

Answer 9

The number of times the Current changes Direction back & forth each Second.

Question 10

What is the Frequency in the UK?

Answer 10

50Hz.

Question 11

What is the Potential Difference in the UK?

Answer 11

230V.