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Y9 LC4 Physics Trilogy Test 2020

Total questions: 60

Worksheet time: 15hrs 0mins

Name
Class
Date
1.

Electric current is defined as the flow of what?

a)

neutrons

b)

charge carriers

c)

electrons

d)

atoms

e)

protons

2.

At what frequency is main voltage?

a)

50 Hz

b)

230 Hz

c)

100 Hz

d)

Depends what device you're using.

3.

Step-up transformers...

a)

Improve the efficiency of the National Grid

b)

Reduce the voltage to a safe level for the home

c)

both

d)

neither

4.

What is an Ohmic Conductor?

a)

One where the resistance remains constant.

b)

One where the resistance changes at a constant rate.

c)

One where the resistance is directly proportional to the current flowing.

d)

One where the resistance is proportional to the potential difference.

5.

What is voltage?

a)

The amount of energy transferred per unit charge.

b)

How fast the electrons in a circuit are moving.

c)

The number of electrons in a circuit.

d)

The rate of flow of charge.

6.

How much charge flows through a circuit if 2.7 A flows for 1 hour?

a)

2.7 C

b)

162 C

c)

9720 C

d)

583200 C

7.

To the nearest whole number, what is the current flowing through a bulb with a power rating of 100W and a resistance of 15 Ohms?

a)

7 A

b)

3 A

c)

2 A

d)

1500 A

8.

A battery provides a voltage of 1.5 V in a circuit that has a resistance of 0.1 kΩ. What current will flow in the circuit?

a)

0.015 A

b)

15 A

c)

0.15 A

d)

1.5 A

9.

A laptop is rated at 2.3A and 15V. How much power does it use? Give your answer to 2s.f.

a)

34.5 W

b)

34 W

c)

35 W

d)

40 W

10.

How much charge flows when a 9 V battery transfers 180 mJ of energy?

a)

0.02 C

b)

0.05 C

c)

20 C

d)

1620 C

11.

A series circuit contains 2 resistors each with a resistance of 15 ohms and a light bulb with a resistance of 10 ohms. What is the total resistance of the circuit?

a)

5 ohms

b)

10 ohms

c)

15 ohms

d)

30 ohms

e)

40 ohms

12.

There is a bulb in a circuit. What happens when you add a second bulb in parallel to the first?

a)

The first bulb gets brighter

b)

The second bulb will be as bright as the first because they both get full power

c)

The circuit will no longer work

d)

Both bulbs will be half as bright because the voltage is divided by two now

13.

Which of the following are true?

a)

The current is the same through each component in a series circuit.

b)

Potential difference is shared between components in a series circuit.

c)

The current is the same through each component in a parallel circuit.

d)

Potential difference is shared between components in a parallel circuit.

14.

How much current is flowing in this circuit?

a)

0.02 A

b)

0.09 A

c)

0.03 A

d)

0.18 A

15.

Which of the following statements are true?

a)

Increasing the length of a wire increases its resistance.

b)

Increasing the diameter of a wire increases its resistance.

c)

Decreasing the length of a wire increases its resistance.

d)

Increasing the temperature of a wire increases its resistance.

e)

You can't change the resistance of a wire.

16.

What is wrong in this picture of a plug?

a)

The Earth and the Live have been swapped

b)

The Live and the Neutral have been swapped

c)

The Neutral and the Earth have been swapped

d)

The Earth is the wrong colour

e)

the fuse has blown

17.

The reading on A1 is 4A. Assuming the bulbs are identical, what will the reading on A2 be?

a)

4A

b)

1A

c)

2A

d)

3A

18.

The bulb on the top branch has a higher resistance than the bulb on the lower branch. Which statements will be true?

a)

A1 = A4

b)

A2 > A3

c)

A2 < A3

d)

All ammeters will read different values.

19.

The resistance of the component

a)

is always constant as the p.d. increases

b)

starts high and then decreases as the p.d. increases

c)

starts constant for low values of p.d. and then increases as the p.d. increases

d)

starts constant for low values of p.d. and then decreases as the p.d. increases

20.

Which component has the highest resistance?

a)

1

b)

2

21.

The Law of Conservation of Energy states that energy cannot be what? (Pick all that apply)

a)

Created

b)

Destroyed

c)

Transferred

d)

Transformed

22.

What is a renewable energy resource?

a)

One that can be used again.

b)

One that can be replenished in a human lifetime.

c)

One that will run out in a human life time.

d)

One that doesn't emit greenhouse gases.

23.

Which of the following statements is true for a cup made from good thermal conductor?

a)

A hot liquid in it will stay hot for a long time.

b)

A hot liquid in it will cool down fast.

c)

It will feel cold on the outside if it contains a cold liquid.

d)

It will feel cool on the outside if it contains a hot liquid.

24.

What is the unit for power?

a)

Joules

b)

Watts

c)

Amps

d)

Volts

25.

How is power different to energy?

a)

Power is a measure of how fast energy is transferred.

b)

Energy is a measure of how fast power is transferred.

c)

They are the same thing.

d)

Power is used when thinking about efficiency and energy isn't.

26.

What do hydroelectric, tidal and geothermal have in common?

a)

They all rely on the Moon.

b)

They all involve water.

c)

They are all location dependent.

d)

They are all very reliable.

27.

What is an advantage of nuclear power?

a)

It is renewable

b)

It is cheap to set up

c)

It doesn't produce greenhouse gases

d)

It's unreliable

e)

It produces nuclear waste

28.

Which of the following causes acid rain?

a)

Carbon dioxide

b)

Carbon monoxide

c)

Sulphur dioxide

d)

Nitrogen oxide

29.

You're riding along on your bike and you apply the brakes. Which of the following is true?

a)

The kinetic energy store of the bike decreases.

b)

The thermal energy store in the brakes increase.

c)

The chemical energy store in the bike increases.

d)

The thermal energy store in the bike decreases.

30.

This pendulum will swing back and forth forever if there is no friction. Which of the following statements is incorrect?

a)

The pendulum has the most kinetic energy at position 2.

b)

The amount of KE it has at position 2 is equal to the GPE at position 3.

c)

It has equal amounts of GPE at positions 1 and 3.

d)

It is travelling slowest at position 2.

31.

A 2 Kg mass is pushed along a horizontal, friction-less surface by a 3 N force that is parallel to the surface. How much gravitational potential energy would be gained by the mass if it is moved 2 meters horizontally?

a)

0 J

b)

6 J

c)

40 J

d)

4 J

32.

This car needs 8600J of energy to power it. If 5000J is changed into useful energy, how much energy is wasted?

a)

13600J

b)

3600J

c)

5000J

d)

8600J

33.

Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level.

a)

250,000 J

b)

2,450,000 J

c)

2,451,663 J

d)

248 J

34.

Lilly's cat ran through your yard. The cat has a mass of 5 kg. He is running at a speed of 3 m/s. What is the kinetic energy of the cat as he runs?

a)

8.5 J

b)

45 J

c)

7.5 J

d)

22.5 J

35.

Alice kicks a soccer ball with a mass of 2.1 kg. The ball leaves the ground moving 30 meters per second. What is the kinetic energy of the soccer ball?

a)

567 J

b)

900 J

c)

945 J

d)

30 J

36.

What is the mass of a ball that has a kinetic energy of 115 J and is traveling at 9 m/s?

a)

1035 kg

b)

23.5 kg

c)

12.8 kg

d)

2.84 kg

37.

A exercise ball is on a table 2.5 m above the ground. What is the mass of the ball if it has a GPE of 56.8 J?

a)

71 kg

b)

22.72 kg

c)

142 kg

d)

2.32 kg

38.

A TV uses 200 J of electricity and transforms it into 125 J of sound and light and 75 J of heat. How efficient is it?

a)

62.5%

b)

.625%

c)

37.5%

d)

.375%

39.

A machine transfers 150kJ of energy over 2 minutes. How powerful is it?

a)

1250 W

b)

75 W

c)

1.25 W

d)

300 W

40.

A machine is 80% efficient. It has an input power of 340W. How much power is wasted?

a)

272 W

b)

68 W

c)

340 W

d)

260 W

41.

A block has a mass of 54g and a volume of 20cm3. What is the density of the block?

a)

74 g/cm3

b)

1080 g/cm3

c)

34 g/cm3

d)

2.7 g/cm3

42.
Why do ice cubes float in a  glass of water?
a)
the ice cubes are more dense than the water
b)
the water is more dense than the ice cubes
c)
the water is more dense than the glass
d)
the ice is more dense than the glass
43.
Liquids have a __________ volume and ___________ shape.
a)
Definite, Definite
b)
Definite, Indefinite
c)
Indefinite, Definite
d)
Indefinite, Indefinite
44.
What am I? I have a fixed mass, a fixed volume, I cannot be squashed and I have a shape that changes to fit the bottom of my container?
a)
solid
b)
liquid
c)
gas
d)
plasma
45.

The amount of heat required to change the phase of a substance depends on two factors which are

a)

surrounding temperature

b)

temperature change

c)

material

d)

the mass

46.

Water molecules have the greatest kinetic energy in

a)

Ice at 0 ⁰C

b)

Water at 90 ⁰C

c)

Water at 373 K

d)

Steam at 150 ⁰C

47.
What is the state of the substance at point A?
a)
Liquid
b)
Solid
c)
Gas
d)
Plasma
48.
What phase change is happening at point B?
a)
Vaporization
b)
Sublimation
c)
Condensation
d)
Melting
49.

Latent heat is

a)

the heat absorbed or released at a boiling process during a change of phase

b)

the heat absorbed or released at a constant temperature during a change of phase

c)

the heat absorbed or released at a constant temperature during a change of phase of 1 kg object

d)

the heat absorbed or released by an object to increase or decrease its temperature by 1 degree Celcius

50.

The heat absorbed by melting a solid is known as

a)

latent heat of fusion

b)

latent heat of solid

c)

latent heat of liquid

d)

latent heat of vaporisation

51.

specific latent heat of vaporisation is

a)

the amount of heat required to change 1 kg of the substance from the solid to liquid phase without change in temperature

b)

the amount of heat required to change 1 kg of the substance from the liquid to gaseous phase without change in temperature

c)

the amount of heat required to change the temperature 1 kg of the substance by 1 degree Celcius

52.

The graph shows the cooling curve of a substance. At which stages the specific latent heat released?

a)

AB and CD

b)

BC and DE

c)

AB and EF

d)

BC and CD

53.
The amount of energy required to raise the temperature 1ºC for every kilogram is called____?
a)
Thermal Energy
b)
Specific Heat capacity
c)
Temperature
d)
Kinetic Energy
54.
How much heat energy is needed to raise the temperature of 2kg of water from 5 °C to 100 °C? The specific heat capacity of water is 4200 J/kg °C.
a)
42000 J
b)
840000 J
c)
798000 J
55.
11088 J of heat energy are required to raise the temperature of 1.6 kg of copper from 7°C to 25°C. Calculate the specific heat capacity of copper.
a)
385 J/kg °C
b)
124740 J/kg °C
c)
0.002 J/kg °C
56.
How many Joules of energy are required to change 0.010 kg of ice at -2 οC to water at 20 οC? The specific heat capacity of water is 4181 J / kg °C. The specific heat capacity of ice is 2090 J / kg °C. The specific latent heat of fusion of ice is 334000 J/kg
a)
440 J
b)
880 J
c)
4318 J
d)
66,000 J
57.

Rearrange the following equation for specific heat capacity:
 E= m ×c ×ΔTE=\ m\ \times c\ \times\Delta T  

a)

  c = Em × ΔTc\ =\ \frac{E}{m\ \times\ \Delta T}  

b)

  c = m ×ΔTEc\ =\ \frac{m\ \times\Delta T}{E}  

c)

 c = E ×m×ΔTc\ =\ E\ \times m\times\Delta T  

d)

 c=E×mΔTc=\frac{E\times m}{\Delta T}  

58.
As the kinetic energy of the molecules in a substance increases, the temperature of the substance __________.
a)
increases
b)
decreases
59.
An inflated balloon is placed in a refrigerator. Which statement describes the movement of the gas particles in the balloon?
a)
The particles move more slowly and become closer together.
b)
The particles move more slowly and become further apart.
c)
The particles move faster and become closer together.
d)
The particles move faster and become further apart. 
60.

In an isolated system, at a constant temperature, when volume increases then the pressure must...

a)

Increase

b)

Decrease

c)

Stay the same

d)

Impossible to tell

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