Voltage, potential difference and resistance

Question 1

What is voltage or potential difference?

Answer 1

Potential difference is a measure of the difference in electrical potential energy between two points in. a circuit. Potential difference is also called voltage

Question 2

What is the unit of resistance?

Answer 2

The unit of resistance is the ohm (symbol Ω). Large resistances are measured in kilohm (kΩ)
and megohm (MΩ)
1kΩ = 1000Ω
1MΩ = 1000000Ω

Question 3

What is another phrase for voltage?

Answer 3

Electrical energy

Question 4

What does the voltage on a power pack or battery tell you?

Answer 4

The voltage on a power pack or battery tells you how many volts are in it

Question 5

What does the voltage of a bulb tell you?

Answer 5

It refers to the force of electricity going into the bulb from a battery or electrical outlet

Question 6

What happens to the current in a circuit if you increase the voltage of the power supply?

Answer 6

If you increase the voltage of the power supply then the current would make the lamp brighter

Question 7

What is meant by resistance?

Answer 7

Resistance - when something resists the current of flow

Question 8

What is the equation for voltage

Answer 8

Voltage = current x resistance
V = I x R

Question 9

What is the equation for resistance

Answer 9

Resistance = voltage/current 
R = I/V