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GCSE Physics > P4 > Flashcards

P4 Flashcards

1
Q

Advantages of a circuit diagram

A

Shows how components in a circuit are connected

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2
Q

What is the difference between a cell and a battery

A

A cell is one
A battery is more than one

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3
Q

What symbol is this

A

Cell

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4
Q

What symbol is this

A

Ammeter

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5
Q

What symbol is this

A

Voltmeter

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6
Q

What symbol is this

A

LDR

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7
Q

What is an electric current

A

An electric current is the flow of charge

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8
Q

What is current measured in

A

Amperes (amps)

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9
Q

What is the equation linking current time and charge

A

Current = charge / time

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10
Q

What is this symbol

A

Battery

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11
Q

What is this symbol

A

Fuse

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12
Q

What is this symbol

A

Resistor

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13
Q

What is this symbol

A

LED

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14
Q

What is this symbol

A

Switch (closed)

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15
Q

What is this symbol

A

Switch (open)

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16
Q

What is this symbol

A

Thermistor

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17
Q

What is this symbol

A

Variable resitor

18
Q

What is charge measured in

A

Coloumbs

19
Q

What is a cell

A

Provides the “push” for electrons in a circuit

20
Q

What is the function of an ammeter

A

Used to measure current (amps)

21
Q

What is the function of a voltmeter

A

Used to measure potential difference (voltage)

22
Q

What is the function of a bulb/lamp

A

Emits light when current passes through it

23
Q

What is an LDR

A

Light dependent resistor

24
Q

What is the function of a fuse

A

Melts and breaks the circuit if the current is too high

25
Q

What is the function of a resistor

A

Limits the current in a circuit

26
Q

What is the function of an LED

A

Emits light when current passes through it

27
Q

What is potential difference/voltage

A

Amount of work done (energy transferred) by each of coloumb of charge that passes through the circuit between two points

28
Q

What equation links potential difference /voltage , Energy (J) and Charge(C)

A

PD = E/Ch

29
Q

What is the function of a switch

A

Emables current in a circuit to be switched on or off

30
Q

What is a thermistor

A

Temperature dependant resistor

31
Q

What is the function of a varaible resistor

A

Allows current to be varied

32
Q

What is electrical resistance

A

Electrical resistance ina circuit is the opposition to the flow of charge

33
Q

What is the unit for electrical resitance

A

OHMS (Ω)

34
Q

What factors affect the resistance in a wire

A

-temperature
-diameter of the wire
-length of the wire
-Conductivity of wire material

35
Q

What is Ohms law

A

The current at constant temperature is directly proportional to the voltage (potential difference) across the resistor

36
Q

How is volatage proportional to current

A

As voltage increases current increases, directly proportional

37
Q

What is the equation that links voltage, current and resistance

A

Voltage= current(A)x resistance(Ω)

38
Q

what happens to the current in a series circuit if more components are added

A

The current stays the same

39
Q

What happens to the voltage in a series circuit if more components are added

A

The total voltage is of the supply is shared between the components in series

40
Q

How do you find the total resistance in a series circuit

A

Add up all resistance in the circuit

GCSE Physics (12 decks)

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