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T Level Health > Physics > Flashcards

Physics Flashcards

1
Q

What is an electric current

A

The flow of electrons

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2
Q

Formula for charge

A

Q =I x t

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3
Q

What is charge (Q) measured in

A

Columbus

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4
Q

What is current (I) measured in

A

Amps

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5
Q

What is time (t) measured in

A

Seconds

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6
Q

Potential difference (voltage)

A

The driving force that causes charge to flow round a circuit

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7
Q

What is potential difference measured in

A

Volts

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8
Q

Resistance

A

The property of any component of a circuit that slows the flow of current

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9
Q

What is resistance measured in

A

Ohms

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10
Q

Equation for potential difference

A

V = I x R

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11
Q

Direct current

A

flows in one direction from positive to negative terminals

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12
Q

Alternating current

A

Changes direction alternating p.d where the positive and negative ends alternating

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13
Q

Where is AC used

A

-mains electric supply
-homes

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14
Q

Where is DC used

A

-phone charger

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15
Q

Series circuit

A

Where components are connected in line, end to end between the positive and negative terminals of the power supply

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16
Q

Parallel circuits

A

Where the components are each connected separately to the positive and negative terminals of the power supply

17
Q

What happens when resistors are connected in series

A

Total resistance equal to the sum of the individual resistors

18
Q

Resistors in series

A

R total = R1 +R2 +Rn

19
Q

What’s the p.d in parallel circuits

A

The potential difference is the same across all branches of a parallel circuit

20
Q

What’s the current in parallel circuits

A

The current is different in different parts of a parallel circuit

21
Q

What’s the current in a series circuit

A

The current is the same in all parts of a series circuit

22
Q

What’s the p.d in a series circuit

A

Potential difference is shared between components in a series circuit

23
Q

Convert 1kV into V

A

1000V

24
Q

What’s the frequency of main electricity in uk

A

50Hz

25
Q

What’s the main voltage

A

230v

26
Q

magnet

A

a material that produces a magnetic field

27
Q

magnetism

A

the force experienced by some types of metals in the earths magnetic field

28
Q

magnetic field

A

a region where magnetic materials experience a force

29
Q

electromagnet

A

produced when a current flows through a coil of wire

T Level Health (20 decks)

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