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Pysics Y10 > Electrical Energy > Flashcards

Electrical Energy Flashcards

(60 cards)

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1
Q

What is current

A

Current t measures the number of electrons though a wire per second. The bigger the wire the more electrons there are in it so more can flow through it

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2
Q

What is current measured in

A

Amperes/Amps (A)

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3
Q

What does voltage measure

A

The amount of pressure pushing electrons through a wire, like the pressure of water in a hose. The more the voltage is increased, the more energy is available to move the electrons through the wire

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4
Q

What is voltage measured in

A

Volts (V)

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5
Q

What does power measure

A

Power measures the rate of work done by electricity. The higher the voltage and current, the more electrical power available in the circuit

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6
Q

What is power measured in

A

Watts(W)

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7
Q

What is the effect of electricity

A

Electricity is the effect of stationary or moving charges

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8
Q

What are the two types of circuit

A

Parallel
Or series

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9
Q

If it’s a circuit

A

Electricity can flow

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10
Q

Battery

A

Is the power source

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11
Q

What does an ammeter do

A

Measures electric current

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12
Q

Switch

A

Straight line dot up line dot line

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13
Q

Variable resistor

A

Normal resistor with diagonal arrow through rectangle

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14
Q

Voltmeter

A

Line circle with captivating v in it and then straight line again

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15
Q

Ammeter

A

Line circle with capital A in t and the line

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16
Q

Cell

A

Sideways T with + and then blocky sideways T with - above

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17
Q

Battery

A

Sideways T gap and then small other side T dash lines and then vertical line and then gap and then sideways T

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18
Q

Motor

A

Straight line circle with M in it and then straight line

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19
Q

Motor

A

Straight line circle with M in it and then straight line

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20
Q

Resistor

A

Straight line block and then straight line

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21
Q

Bulb

A

Small line circle with x in it then small straight line

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22
Q

What conclusion can you make about current in a series circuit

A

The current is the same throughout the circuit

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23
Q

What do resistors do

A

Resistors slow down the current. The higher the value the greater the reduction in current

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24
Q

What conclusion can you make about voltage in a series circuit

A

The voltage in a series circuit will add up to the voltage of the batteries (this is conservation of energy)

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25
What conclusion can you make about the current in a parallel circuit
The current in the parallel parts of the circuit adds up to the current in and out of the battery.
26
What conclusion can you make about the voltage in a parallel
The voltage in a parallel circuit is the same as the battery across each loop/branch
27
If the device is across the component it’s a
Voltmeter
28
If the device is in the circuit it’s an
Anmeter
29
Describe in summary series circuits
The current is the same at all points in the circuit Voltage is shared across components The total resistance of a number of resistors in this circuit is equal to the sum of all the individual resistances Adding a resistor increases the total resistance because electric charge has to pass through another component
30
Describe in summary the parallel circuit
-The current spilts at a junction -Voltage of the battery and branches are the same -When resistors are connected in this circuit they have the same potential difference across them -The total resistance value will always be less then the smallest individual resistor in the combination -Adding a resistor would decrease the total resistance because you are providing an alternate path(that’s easier) for the electric charge
31
What does a diode do
Stops the current flowing in one direction
32
How does an LDR work
If the LDR is in the dark(high resistance) the LED is dim/off(low current flow) If the LDR is in the light (low resistance the LED is bright(lots of current flow
33
What does a bulb do
Changes electrical energy into light energy
34
What does a cell/battery do
Provide electrical energy to the circuit
35
What does a resistor do
A component which limits the amount of current flowing in a circuit
36
Wha5 dies a variable resistor do
A resistor which can be adjusted
37
What does an LED todo
A low energy light source
38
What does an LDR do
The resistance changes when light levels changes
39
What object measures current
Ammeter
40
What device measures voltage
Voltmeter
41
How would you describe resistance
The opposition to the flow of current
42
What is ohms law
Voltage=resistance x current Resistance= voltage ➗ current (I) Current=voltage ➗ resistance
43
What resistance mean
The number of volts required to push each amp through a component
44
How many ohms is Kohms
1000 ohms
45
What is charge
The current that flows every second
46
What is the charge and current triangle
Q(charge)= I (current) x t (time) I=Q ➗ t T=Q ➗ I
47
What are non renewable resources
They resources that will eventually run out and cannot be replaced. For example, coal oil gas nuclear.
48
What are renewable sources
These are inexhaustible and will not run out (solar) or can be replaced quite quickly( wood) Other examples include wind, solar, Hydro, tidal, geothermal, biomass
49
How is coal firmed
Coal is formed from dead plants have been buried in mud for millions of years. This forms peat which turns into coal over time as more water and air are squeezed out due to the huge pressure of the layers of rock building up on top.
50
How is oil formed
-Oil is formed from the remains of plankton(small animals) that lived in the sea millions of years ago. -The dead plankton are covered by mud on the seafloor and slowly change into oil trapped between layers of rock. -This change happens due to the action of heat and microbes.
51
Where is natural gas found
-Natural gas is fine underground often in the same place as oil -A mixture of gases make up ‘ natural gas’ -It is mainly made up of methane gas
52
What are seven types of energy and examples?
Elastic=bungee jump Sound=siren Kinetic=racing car Electrical=LED Nuclear =uranium Chemical=coal Heat=toaster
53
Most electricity is produced by a steam turbine. How does that work
-Fuel is burned to boil water at a high pressure -The boiling water produces superheated steam -the Superheated steam turns a turbine -The turbine rotates a magnet in the generator -The rotating magnet generates electricity
54
What types of energy are involved in a steam turbine
Fuel at beginning = chemical energy Furnace = heat energy Turbine turning from steam= kinetic energy Generator that generates electricity =electrical energy
55
How many amps are 2mA
0.002 amps
56
Diode symbol
Straight line triangle vertical line on tip continue straight line
57
LED symbol
Straight line triangle with diagonal arrows emitting out then vertical line and then continue straight line
58
LDR symbol
Resistor with circle around it and arrows pointing towards it
59
60

Pysics Y10 (5 decks)

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