P2.3 Currents

Question 1

What’s a current?

Answer 1

A flow of electrical charge

Question 2

What’s potential difference?

Answer 2

Work done per coulomb

Question 3

Describe the sign for a thermistor?

Answer 3

Rectangle
With line through it
Like a slanted backwards L

Question 4

Describe the sign for a diode?

Answer 4

Circle
Triangle
Line

Question 5

Describe the sign for and LED?

Answer 5

Circle
Triangle
Line
2 arrows facing out

Question 6

Describe the sign for an LDR?

Answer 6

Circle
Rectangle
2 arrows facing in

Question 7

What’s the graph for a current and p.d. at a constant temperature?

Answer 7

Straight diagonal

Question 8

What’s the graph for current and p.d. at an increasing temperature?

Answer 8

Curved

Then straight

Question 9

P.d. and current in a parallel circuit?

Answer 9

P.d. Is divided

Current is the same

Question 10

P.d. And current in a series circuit?

Answer 10

P.d. Is the same

Current is divided

Question 11

What’s a diode?

Answer 11

Stop current one way

Question 12

What happens to resistance of a thermistor as temperature increases?

Answer 12

Decrease

Question 13

What’s static electricity?

Answer 13

Negatively charged electrons rub from one material to another