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Core Questions > Electricity > Flashcards

Electricity Flashcards

1
Q

How do objects become charged?

A

By friction – rubbing a balloon against your jumper or a rod with a cloth

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2
Q

What do we mean by charge?

A

Charge is a property of particles, just as size is a property of particles.

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3
Q

How do charged objects behave?

A

Similarly charged objects repel, oppositely charged objects attract.

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4
Q

How do charges interact?

A

They can repel or attract each other

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5
Q

What is an electric field?

A

The space around a charged object where another charged object feels a force of attraction or repulsion.

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6
Q

How can we make large amounts of charge?

A

We can use a machine called a Van De Graaf generator.

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7
Q

How are large amounts of charge made naturally?

A

When rain clouds pass past each other.

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8
Q

What is the danger of high amounts of charge?

A

High amount of charge can cause electric shocks.

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9
Q

How do we make large amounts of charge safe?

A

We ‘Earth’ object so they take the charge to the ground.

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10
Q

What do we mean by the conduction of charge?

A

When charges can flow through materials.

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11
Q

What do we mean by insulators?

A

Materials that do not let charge flow through them.

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12
Q

What kind of materials are conductors and insulators?

A

Metals are good conductors of charge and plastics or rubber are good insulators.

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13
Q

In electricity, what do we mean by components?

A

Any simple electrical device is called a component.

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14
Q

How do we represent circuit components?

A

We use symbols to represent components.

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15
Q

How do we represent circuits where components are connected up?

A

We use circuit diagrams.

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16
Q

What is a complete circuit?

A

When there is an unbroken route from one component to the next and back to the first.

17
Q

How do we draw circuits?

A

We use circuit diagrams

18
Q

What is electric current?

A

Current is a flow of electric charge

19
Q

What is potential difference?

A

Potential difference is the ‘push’ that make charges flow.

20
Q

What does current do when it passes through conductors and components?

A

Current shifts energy from one component to another.

21
Q

How can we model current, potential difference and and resistance in a circuit?

A

The Water Heater Model and the Rope Model,

22
Q

How do we measure current?

A

We measure current with an ammeter.

23
Q

What is the unit of current?

A

The unit of current is Amperes (or Amps for short).

24
Q

What is the unit of potential difference?

A

The unit of potential difference is the Volt

25
Q

What happens to current as it passes around a circuit?

A

The current shifts energy, it is not charged.

26
Q

What is the difference between a series and a parallel circuit?

A

A series circuit has only one pathway or loop back to the cells, a parallel circuit has more than one pathway.

27
Q

How do bulbs behave in a series circuit?

A

In a series circuit adding another bulb will cause both bulbs to become dimmer and if one bulb is broken the other does not light up.

28
Q

How do bulbs behave in a parallel circuit?

A

In a parallel circuit adding another bulb will cause both bulbs to light up the same as before and if one bulb is broken the other bulb carries on as normal.

29
Q

What happens to current as it travels around a circuit?

A

The current shifts energy but it is not used up.

30
Q

How does the current behave in a series circuit where there is only one pathway?

A

The current is the same in every part of the circuit.

31
Q

What happens to current in a parallel circuit where there are two pathways?

A

The current in each pathway adds up to the current coming from or returning to the cell/battery.

32
Q

What is an electric plug used for?

A

To supply electricity to electrical devices.

33
Q

What materials is it made from and why?

A

Plastic casing because it is an insulator and brass pins because it is a conductor.

34
Q

What does it have inside and why?

A

2 or 3 wires with the outside made of plastic insulator, covering copper wire, a conductor.

35
Q

What is the job of the Earth wire in a plug?

A

To make the electrical device safe in case of a fault.

36
Q

What is the job of a fuse in a plug?

A

To prevent wire from overheating and causing a fire.

37
Q

What is a fuse wire?

A

A very thin piece of conducting metal wire that can take a certain amount of current.

38
Q

What happens if too much current flows through a fuse wire?

A

If too much current flows through a fuse wire it get so hot that it melts.

Core Questions (7 decks)

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