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Physics > Electricity > Flashcards

Electricity Flashcards

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1
Q

Electrical current

A

Electric charge transferred per unit

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2
Q

Direct current

A

Charges flow in one direction

Even though charges travel in one direction it doesn’t mean it has a constant voltage

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3
Q

Alternating current

A

Charges move top and fro

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4
Q

What do charged particles experience in an electric feild

A

Force

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5
Q

Potential difference

A

Measure of the energy given to the charge carrier in a circuit

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6
Q

Ohms law experiment

A

Connect an ammeter, voltmeter and a variable voltage supply together using connecting leads

Increase the voltage and see what happens to current

Plot a graph and determine resistance

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7
Q

Transister

A

Electric switch in a curcuit

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8
Q

Electrical power

A

Amount of energy transformed per unit time

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9
Q

Reistance

A

measure of how hard it is for charges to flow through a component or wire.

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10
Q

What fuse should be used for appliances over 720 W

A

13A

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11
Q

What fuse should be used for appliances under 720 W

A

3A

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12
Q

Conducter

A

Material in which charges can move eg iron

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13
Q

Insulater

A

Material where charge carriers can move through eg glass

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14
Q

Potential difference

A

The work done in moving 1c of charge from one point to another

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15
Q

Series curcuit

A

One complete path of conductors
Current same at all points

Sum of components = voltage of supply

When another resister is added resistance increases

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16
Q

Parallel curcuits

A

More than one path for conductors

Sum of current in parallel branches = voltage of supply

When another resister is added resistance decreases

17
Q

Wher does an ammeter go in a curcuit

A

Before the resistor

18
Q

Where does voltage go in a curcuit

A

Above the resister

19
Q

Where does an ohmmeter go in a curcuit

A

Takes place of cell

20
Q

Why can water conduct

A

Water is eltrically neutral

Contains both positive and negative ions

21
Q

Cell

A

Source of electrical energy

22
Q

Variable resistor

A

Increases and decreases current

23
Q

What happens to neutrons in an electric field

A

Neutron does not experience an electrical force in an electric feild

24
Q

Why does the ohms law graph start at the Origen

A

When switch is open reading on metre is 0

25
Q

Diode

A

Divivce that allows electrons to flow in 1 direction

26
Q

Capaitator

A

Prides energy quickly

Eg flash on camera

27
Q

Input devises

A

Put energy into electronic curcuits

28
Q

Output devises

A

Change energy out of electronic curcuits

29
Q

Trasistor

A

Very fast electronics which are used for automatic control of electronic curcuits

30
Q

Mosfets

A

Switcg on a set voltage

Physics (8 decks)

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