Electricity

Question 1

2 types of circuits

Answer 1

1. Series

2. Parallel

Question 2

What is electricity and S.I unit

Answer 2

• Form of energy made available by the flow of electric charge (electric current) in a conductor

> joule (J)

Question 3

Sources of electricity

Answer 3

• Battery

- Cell (Singular of battery?)

Question 4

Electric current and S.I unit

Answer 4

• Rate of flow of electric charge/ electricity

> Ampere

Question 5

Function of ammeter and how is is used

Answer 5

• Measure the electric current

> To measure electric current in circuit, connected in series circuit

Question 6

Purpose of volmeter and how it’s meant to be used

Answer 6

• Measure voltage across a component

- Connected parallel to the component

Question 7

4 properties of series circuit

Answer 7

1. One path for current to flow through
2. Same current flows through every component
3. Circuit open at any point, no current would flow
4. *Total voltage across the source is equal to the sum of all the voltages across each component
   (think of it as a voltage divider)

Question 8

4 properties of a parallel circuit

Answer 8

1. More than 1 path for current to flow through
2. Sum of the current through each path is equal to the total current that flows through the source
3. If one path is open, current will still flow in all other paths
4. *Voltage is the same across the separate branches (across the same 2 points)

Question 9

What is voltage

Answer 9

The amount of energy

Question 10

Purpose of a resistor

Answer 10

Slow down the rate at which the electric current flows (larger resistance, smaller the current)

Question 11

Purpose of a rheostat

Answer 11

• Resistance value can be adjusted

- Usually used to control current (e.g to control brightness of lamp)