# Section 5- Electricity And Circuits Flashcards Preview

## Physics GCSE Edexcel > Section 5- Electricity And Circuits > Flashcards

Flashcards in Section 5- Electricity And Circuits Deck (20)
1
Q

Current

A

Current is the flow of electric charge (eg. Electrons) around the circuit

2
Q

Potential difference

A

Potential difference is the energy transferred per coulomb of charge that passes between two points in an electrical circuit

3
Q

Resistance

A
• usually increases with temperature

* when an electrical charge flows through a component it has to work against resistance

4
Q

Equation for charge

A

Charge= current x time

5
Q

Equation for energy transferred

A

Energy transferred = charge moved x potential difference

6
Q

Equation for potential difference

A

Potential difference= current x resistance

7
Q

What happens when resistance increase?

A

Temperature usually increases as well

8
Q

Series circuit

A

-

9
Q

Parallel circuit

A

-

10
Q

Why is heating a circuit not always bad?

A

-

11
Q

Equation for power

A

Power= energy transferred/ time

```   E P=  —
T```
12
Q

Equation for electrical power

A

P=IV

Electrical power(W) = current (A) x Potential difference (V)

13
Q

Live wire

A
• Brown

* the live wire carries the voltage

14
Q

Neutral wire

A
• Blue

* the neutral wire completes the circuit

15
Q

Earth wire

A
• Green and Yellow

* the earth wire is for safety and protecting the wiring

16
Q

Fuses

A

-

17
Q

Circuit breakers

A

-

18
Q

Insulators

A

-

19
Q

LDR

A

Light dependent resistor
•dependent on the intensity of light
•in bright light the resistance falls
•in darkness the resistance is higher

20
Q

Thermistor

A
• dependent on temperature
• in hot conditions the resistance drops
• in cool conditions the resistance goes up