10.1 Voltage and resistance

Question 1

what is voltage?

Answer 1

a measure of energy in circuit

Question 2

what is voltmeter

Answer 2

device for measuring voltage (unit: volts (V))

Question 3

define resistance

Answer 3

a measure of how difficult it is for current to flow. (measure in ohms Ω)

Question 4

define resistor

Answer 4

the device which resists the flow of current

Question 5

Why is it important for all the cells to be connected the same way round?

Answer 5

Because if it isn’t connected the same way round, there will be a break in the circuit

Question 6

What name is given to material which have very low resistance?

Answer 6

Good conductor

Question 7

What name is given to material which have very high resistance?

Answer 7

Insulator

Question 8

What is the formula for current?

Answer 8

current (I) = voltage/resistance

Question 9

What is current?

Answer 9

the rate of the flow of electrons. It’s measured in amperes, which are also called amps

Question 10

What does an ammeter do?

Answer 10

It measures current