Static Electricity, Circuits And Resistance

Question 1

Voltage definition.

Answer 1

The driving force that pushes current round. Unit: volt, V

Question 2

Potential difference definition.

Answer 2

The energy per unit of charge. Unit: volt, V

Question 3

Current definition.

Answer 3

The flow of electrons round the circuit. Current will only flow through a component if there is a voltage across the component. Unit: ampere, A

Question 4

What is an ammeter?

Answer 4

Measures current (amps).
Must be placed in series.
Can be put anywhere in series.

Question 5

What is a voltmeter?

Answer 5

Measures voltage.
Must be placed in parallel.
The proper name for “voltage” is potential difference.

Question 6

What is the voltage and current like in parallel circuits?

Answer 6

Voltage - same across all components.

Current - adds up to the total current supplied by battery.

Question 7

What is the voltage and current like in series circuits?

Answer 7

Voltage - adds up to total voltage supplied by battery

Current - same all the way round the circuit

Question 8

Resistance definition.

Answer 8

How easy it is for charges to flow. Unit: ohm