Plug it in Switch it On - Circuits Flashcards Preview

Science Year 10 Half Yearly > Plug it in Switch it On - Circuits > Flashcards

Flashcards in Plug it in Switch it On - Circuits Deck (18)
Loading flashcards...
1
Q

Resistor

A

An electrical component that limits or regulates the flow of electrical current

2
Q

a Load

A

Any electrical component that changes electrical energy into other forms of energy

E.g. Light bulb transfers electricity into Heat and Light energy

3
Q

Conductor

A

an Object or type of material that allows the flow of electrical current (metals)

4
Q

Voltage(v)

A

The measure of the the electrical energy carried by the charges (electrons) in a circuit

5
Q

What is voltage measured in and how is it measured?

A

Measured in Volts(v), measured with a Voltmeter

6
Q

Resistance (R)

A

The measure of how much a load restricts and reduces the flow of current

7
Q

How is resistance measured?

A

Using Ohms Law

8
Q

Current (i)

A

The flow of charge in a circuit

9
Q

How is current measured?

A

Measured using an ammeter, measured in Amps(A)

10
Q

Ohms Law

A

V=IxR

Variations:
R=V/I
I=V/R

11
Q

If Voltage Rises then _____

A

Current increases

12
Q

How can we keep resistance constant in an experiment?

A

Replace loads after each test as as they heat up there is more resistance.

13
Q

What is the water analogy for electrical circuits?

A
  1. Water will flow down the path with the least resistance (Current)
  2. The bigger the pipe, the more water can flow through (Voltage)
  3. The more water pressure (kinetic energy), the faster the water moves (Voltage)
14
Q

List 3 Advantages of a Series Circuit

A
  1. Cheap to create
  2. Smoke detectors
  3. Simple - one switch required
15
Q

List 2 Disadvantages of a Series Circuit

A
  1. If one load goes out, they all go out

2. Less current is drawn every time a load is added (Because more resistance)

16
Q

Parallel Circuit

A
  1. Components are connected in separate branches
  2. Current is divided between each components in branches
  3. Each branch uses full voltage provided by power pack
17
Q

List Advantages of Parallel Circuits

A
  1. If more loads are added, they will not dim each other

2. Different loads that require different current will work on the same circuit

18
Q

List Disadvantages of Parallel Circuits

A
  1. Expense to make

2. More current is drawn every time a load is added (makes battery go flat faster)