Physics Paper 1

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What is the formula to work out kinetic energy?

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Physics

10th

191 Terms

1

What is the formula to work out kinetic energy?

Kinetic energy = ½ x mass x speed²

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2

What is the standard unit for mass?

Kilograms

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3

What is the standard unit for speed?

Metres per second (m/s)

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4

What is the standard unit for kinetic energy?

Joules

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5

What is the standard unit for elastic potential energy?

Joules

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6

What is the standard unit for the spring constant?

Newtons per metre (N/m)

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7

What is the standard unit for extension in the elastic potential energy equation?

Metres

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8

What is the formula for gravitational potential energy

G.P.E = mass x gravitational field strength x height

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9

What is the standard unit for mass?

Kilograms

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10

What is the standard unit for gravitational field strength?

N/kg

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11

What is the standard unit for specific heat capacity?

Joules per kilogram per degree Celsius (J/Kg°C)

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12

What is this the definition of:

The amount of energy required to raise the temperature of 1kg of a substance by 1°C

Specific Heat Capacity

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13

What is defined as the rate at which energy is transferred or work is done?

Power

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14

What is the standard unit for power?

Watts

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15

What is the equation that links power, energy transferred and time?

Power= energy transferred/time

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16

What is the equation that links power, work done and time?

Power= work done/time

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17

What is energy transferred the same as?

Work Done

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18

An energy transfer of 1 joule per second is equal to a power of?

1 Watt

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19

If two electric motors both lift the same weight, the same height which will do it faster?

The most powerful one

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20

Energy can be transferred, stored or dissipated but cannot be

Created or destroyed

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21

In what type of system is there no net change to the total energy?

Closed

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22

How can we reduce unwanted energy transfers?

-Lubrication

-Use of thermal insulation

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23

How does increasing the thermal conductivity of a material affect the rate of energy transfer by conduction?

It increases it

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24

What factors affect the rate of cooling of a building?

-Thickness of walls

-Thermal conductivity of walls

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25

How do you work out efficiency from input and output energy?

Efficiency = Useful output energy transfer/ Total input energy transfer

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26

How do you work out efficiency from power input and output

Efficiency = Useful power output/Total power input

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27

What are the three main types of fossil fuels?

Coal, Oil, Gas

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28

Name the main non-renewable energy resources?

Fossil fuels, Nuclear fuel

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29

Name 6 renewable energy resources

Biofuel, Wind, Hydro-electricity, Geothermal, Tidal, Solar, Water waves

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30

What type of resource is one that is being replenished as it is used?

Renewable

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31

Draw the circuit symbol for an open switch

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32

Draw the circuit symbol for a closed switch

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33

Draw the circuit symbol for a cell

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34

Draw the circuit symbol for a battery

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35

Draw the circuit symbol for a diode

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36

Draw the circuit symbol for a resistor

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37

Draw the circuit symbol for a variable resistor

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38

Draw the circuit symbol for a LED

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39

Draw the circuit symbol for a lamp

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40

Draw the circuit symbol for a fuse

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41

Draw the circuit symbol for a voltmeter

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42

Draw the circuit symbol for an ammeter

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43

Draw the circuit symbol for a thermistor

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44

Draw the circuit symbol for a LDR

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45

What is required for an electrical charge to flow through a closed circuit?

A potential difference

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46

What is the flow of electrical charge?

Electric current

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47

What equation links charge flow, current and time?

Charge flow = Current x Time

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48

What is the standard unit for current?

Amps

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49

What is the standard unit for Charge flow?

Coulombs

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50

What is the standard unit for time?

Seconds

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51

What is the equation that links resistance, potential difference and current?

Potential difference = Current x Resistance

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52

What two things does the current flowing through a component depend on?

Resistance, Potential Difference

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53

If you increase the resistance of a component what happens to the current, for a set potential difference

Decreases

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54

What is the standard unit for resistance?

Ohms

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55

What is the standard unit for potential difference?

Volts

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56

How are current and potential difference linked in an ohmic conductor

They are directly proportional

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57

Through which component is resistance constant?

Ohmic conductor

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58

How does the resistance of a filament lamp change as the temperature increases?

It increases

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59

How does the current flow in a diode?

In one direction only

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60

What can you tell me about the resistance in a diode?

Very high in the reverse direction

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61

How does the resistance of a thermistor change as the temperature increases?

It decreases

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62

How does the resistance of an LDR change as light intensity increases?

It decreases

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63

What could LDR’s be used for

Switching lights on when it gets dark

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64

What could a thermistor be used for?

In a thermostat to control heating

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65

What is the current like in a series circuit?

The same everywhere

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66

What is the total resistance of two components in a series circuit?

It is the sum of the resistance of each component

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67

What is the total resistance of two resistors connected in parallel?

Less than the resistance of the smallest resistor

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68

What type of supply is the mains electricity in the UK?

AC

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69

What is the frequency of the domestic electricity supply in the UK?

50Hz

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70

What is the voltage of the domestic electricity supply in the UK?

230V

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71

What type of potential difference varies between a positive and negative value?

Alternating

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72

What type of potential difference is only found in the positive?

Direct

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73

How are most electrical appliances connected to the mains?

Using a three-core cable

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74

What colour is the live wire?

Brown

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75

What colour is the neutral wire?

Blue

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76

What colour is the earth wire?

Green and Yellow Stripes

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77

What does the live wire carry?

The alternating potential difference from the supply

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78

What does the neutral wire do in a plug?

Completed the circuit

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79

What does the earth wire do in a plug?

It is a safety wire to stop an appliance becoming live

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80

What is the potential difference between the live wire and the earth?

230V

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81

What is the voltage of the neutral wire

At or close to 0V

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82

What is the voltage of the earth wire

0V, unless there is a fault

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83

What equation links power, potential difference and current?

Power = Potential difference x Current

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84

What equation links current, resistance and power?

Power = (Current)² x Resistance

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85

What does the amount of energy an appliance transfers rely on?

-How long the appliance is switched on for

-The power of the appliance

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86

What is done when charge flows in a circuit?

Work

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87

What equation links energy transferred, power and time?

Energy transferred = Power x Time

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88

What equation links charge flow, potential difference and energy transferred

Energy transferred=charge Flow x Potential Difference

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89

What is the National Grid?

A system of cables and transformers linking power stations to consumers

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90

What is transferred from power stations to consumers using the National Grid?

Electrical power

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91

What happens when an insulating material is rubbed against other materials?

Electrically charged

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92

When electrons move from the material onto another, what charge will that material become?

Negative

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93

What charge will the material become if it loses electrons?

Positive

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94

What will two objects do if they carry the same charge?

Repel

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95

What will two objects of opposite charge do?

Attract

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96

What does a charged object create?

Electric Field around itself

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97

When is the electric charge most strongest?

When it is close to the charged object

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98

What happens to the charge when the object is moved away from the charge object?

The weaker the field

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99

What will a second charged object experience when placed in a field?

Force

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100

What will happen to the force if the objects distance from each other decreases?

Stronger

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