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Science Year 9 > PHYSICS Electricity > Flashcards

PHYSICS Electricity Flashcards

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1
Q

What is a series circuit?

A

An electrical circuit where all the components are connected in one loop of wire

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2
Q

What happens to the voltage between loops in a parallel circuit?

A

It stays the same

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3
Q

What adds up from each loop in a parallel circuit

A

Current

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4
Q

What is mains electricity

A

The household alternating current electricity supply

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5
Q

What number of volts is the mains electricity

A

230 V

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6
Q

What is the ring main

A

How electricity supply in a house is connected

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7
Q

What is a parallel circuit

A

The components in a circuit are connected on separate loops

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8
Q

What happens if you remove a component in a parallel circuit

A

Nothing will happen because each component of imma desperate loop

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9
Q

Name 4 things that happen when more bulbs are added in a parallel circuit

A

. Bulbs stay at the same brightness
. Each bulb receives the full voltage from the cell
. Overall the current is increased
. The cell will run out quicker

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10
Q

What happens to current in a parallel circuit

A

The total current is found by adding up the currents in each loop

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11
Q

What happens to voltage in a parallel circuit

A

Each loop gets the full voltage of the battery

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12
Q

What is a pole

A

The end of a magnet - it can be north or douth

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13
Q

What’s a force that occurs even though the objects are not touching

A

Non contact

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14
Q

Define attract and repel

A

Attract - pull towards
Repel - push away

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15
Q

What are magnetic field lines?

A

A line drawn on a field drawing

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16
Q

Define magnetic field

A

A region of space that the magnetic force is experienced by a magnetic material

17
Q

What metals are magnetic

A

Iron,Cobalt,Nickel

18
Q

Where are magnetic fields the strongest

A

Where the poles are closest together

19
Q

What are the three rules of drawing field lines

A

. Point from the North Pole towards the South Pole
. Field lines never cross
. The closer field lines are, the stronger the feild

20
Q

Define magnetic field

A

A space where a magnetic material will experience a force

21
Q

What is a device that turns to show the direction of the magnetic field called

A

A gompass

22
Q

What is a permanent magnet

A

A magnetic object that will always have a magnetic field

23
Q

How is a weaker field shown Ona diagram

A

The magnetic field lines get more spread out

24
Q

Explain in 3 points how a compass works

A

. They are small magnets that can freely rotate
. It will line up with the field lines
. The compass will point towards the magnetic South Pole (geographic North Pole)

25
Q

What is a temporary magnet?

A

A magnet that is only magnetic over certain conditions

26
Q

What is an electromagnet

A

A magnet that used electrical current to produce a magnetic feild

27
Q

What is a cylindrical cool of wire called

A

Solenoid

28
Q

What is a core

A

The name for a piece of iron inside an electromagnet used to make the magnetic field strobger

29
Q

Define current

A

Rate if flow of charge

30
Q

Give 4 ways the strength of an electromagnet can be increased

A

. Increase the current through the wire
. Make the wire into a coil
. Increase the number of turns in the coil
. Putting an iron core for n the solenoid

31
Q

What is an armature

A

An iron bar that moves in an electrical bell

32
Q

What is a circuit breaker

A

A safety device that breaks a circuit if there is too much current

33
Q

What is contact

A

The point hagere the circuit can either be made or broken

34
Q

Give 3 advantages of electromagnets

A

. Allows more control of circuits
. Strength can be controlled. Magnet can be switched on and off

35
Q

Give 2 disadvantages of electromagnets

A

. They require current input
. Large versions are expensive to buy

Science Year 9 (2 decks)

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