Electricity

Question 1

What happens to resistance as temperature increases?

Answer 1

Resistance increases

This is a general property of conductive materials.

Question 2

What is the unit of measurement for Potential Difference?

Answer 2

Volts

Question 3

What occurs when insulating materials are rubbed together?

Answer 3

Electrons are rubbed off one material onto the other

Question 4

What charge does a material gain when it gains electrons?

Answer 4

Negatively charged

Question 5

What is the relationship between current and Potential Difference in resistors?

Answer 5

Current is directly proportional to Potential Difference

Question 6

What is the characteristic of a diode?

Answer 6

Current can only flow in one direction

Question 7

What are Ohmic conductors defined by?

Answer 7

I-V Characteristics at constant temperature

Question 8

What is the voltage of mains electricity?

Answer 8

230V

Question 9

What is the function of the Earth wire?

Answer 9

Prevents appliance from becoming live

Question 10

What completes the circuit in electrical wiring?

Answer 10

Neutral Wire

Question 11

What color is the Live wire in electrical systems?

Answer 11

Brown

Question 12

What color is the Neutral wire in electrical systems?

Answer 12

Blue

Question 13

What do field lines produced by a charged object indicate?

Answer 13

Point from positive to negative

Question 14

Fill in the blank: Resistance stays _______.

Answer 14

constant

Question 15

True or False: Static Electricity involves moving electrons.

Answer 15

True

Question 16

What is the significance of the green and yellow stripes on a wire?

Answer 16

Indicates the Earth wire