Electricity Flashcards

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1
Q

Opposite charges

A

Attract

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2
Q

Like charges

A

Repeal

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3
Q

a.c.

A

Alternating current

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4
Q

Voltage in a.c.

A

Continually change direction

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5
Q

d.c.

A

Direct current

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6
Q

Voltage in direct current

A

Only flow in one direction

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7
Q

Current

A

Amount of movement of charge

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8
Q

Current increases

A

Temperature increases

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9
Q

Voltage

A

Difference in electrical potential between two points

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10
Q

Resistance

A

How much opposition there is to the current in a circuit

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11
Q

Resistance decreases

A

Current increases

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12
Q

Voltmeter connected in

A

Parallel

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13
Q

Ohmmeter connected in

A

Parallel

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14
Q

Ammeter connected in

A

Series

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15
Q

Resistor in series

A

Current decreases

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16
Q

Supply p.d. (Vs) equals to

A

V1+V2+V3…

17
Q

Thermistor

A

Temperature increases, resistance decreases (TURD)

18
Q

LDR

A

Light level increases, resistance decreases (LURD)

19
Q

Photovoltaic cell

A

From light energy to electric energy

20
Q

Motor

A

From electric energy to kinetic energy

21
Q

Loudspeaker

A

From electric energy to sound energy

22
Q

Relay

A

Switches on or off a larger current or voltage in a separate circuit

23
Q

Power

A

Energy per second