Y10Electricity Flashcards

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1
Q

Current cannot flow in a circuit that contains any…?

A

gaps

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2
Q

The particles actually moving in a circuit when current flows are called…?

A

electrons

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3
Q

The kind of charge electrons have

A

negative

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4
Q

When electrons move through a cell they gain…?

A

electrical energy

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5
Q

When electrons move through a light-bulb they lose…?

A

electrical energy

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6
Q

Electric current is measured in…?

A

Amperes

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7
Q

Electric current is measured with an…?

A

ammeter

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8
Q

The direction of flow for conventional current in a circuit

A

Positive to negative

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9
Q

The direction of electron movement in a circuit

A

Negative to positive

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10
Q

What do you call a material that allows electric current to flow through itself?

A

Conductor

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11
Q

What do you call a material that does not allow electric current to flow through itself?

A

Insulator

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12
Q

How many possible current paths are there in a series circuit?

A

One

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13
Q

Does a parallel circuit have one or more than one possible current path?

A

More than one

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14
Q

What do you call the pushing force supplied by a cell, which drives current round a circuit?

A

Voltage

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15
Q

The unit in which voltage is measured

A

Volt

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16
Q

The instrument used to measure voltage

A

Voltmeter

17
Q

An ammeter is always connected in…?

A

Series

18
Q

A voltmeter is always connected in…?

A

Parallel

19
Q

Key fact about current in a series circuit

A

Current is the same at all points in the circuit

20
Q

Key fact about voltage in a series circuit

A

Supply Voltage = V₁ + V₂ + V₃ +…

21
Q

Key fact about current in a parallel circuit

A

Total Current = I₁ + I₂ + I₃ + …

22
Q

Key fact about voltage in a parallel circuit

A

Supply Voltage = V₁ = V₂ = V₃ =…

23
Q

Are metals electrical conductors or insulators?

A

Conductors

24
Q

Are non-metals electrical conductors or insulators?

A

Insulators

25
Q

If the current through a light-bulb is increased, its brightness…?

A

Increases

26
Q

If you connect cells correctly in series, the total supply voltage equals the…?… of the cell voltages.

A

sum

27
Q

The unit of electric charge

A

Coulomb (C)

28
Q

The equation linking charge and current

A

Q = It

29
Q

The equation linking voltage and current (Ohm’s Law)

A

V = IR

30
Q

The equation for total resistance of resistors in series

A

R = R₁ + R₂ + R₃ +…

31
Q

The equation for total resistance of resistors in parallel

A

1/R = 1/R₁ + 1/R₂ + 1/R₃ +…