Eletricity And Curcuits

Question 1

What is the charge of an electron, a neutron and a proton

Answer 1

• electron : -1
• neutron : +/- 0
• proton : +1

Question 2

Define currents and its units

Answer 2

Current is the flow of electric charge around a circuit. The current will only flow through an electrical component if there is potential difference across the component, and if the circuit is complete
- unit: Ampere

Question 3

How is current measured?

Answer 3

• measure with an ammeter

Question 4

Where do you put an ammeter in a circuit?

Answer 4

Anywhere in series with a component

Question 5

True or false? The current in a single closed loop of wire is the same at any point

Answer 5

True

Question 6

What is the equation that links charge flow, current and time?

Answer 6

Charge flow = current * time or Q

Question 7

True or false? For a given potential difference, the smaller the resistance of a component, the smaller the current through it will be

Answer 7

False, resistance is anything that slows the flow of charge. So for a given potential difference, the smaller the resistance of a component, the greater the current through it will be

Question 8

What is the equation that links potential difference, current and resistance?

Answer 8

Potential difference = current * resistance or V = IR