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Y9 LC3 Physics Assessment

Total questions: 45

Worksheet time: 2hrs 11mins

Name
Class
Date
1.
This is the symbol for 
a)
Variable Resistor
b)
Thermistor
c)
Light Dependent Resistor
d)
Resistor
2.
This is the symbol for a _____?
a)
Fuse
b)
Resistor
c)
Heater
d)
Strip light
3.

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)

45 ohms

4.

Electric current is the flow of...

a)

neutrons

b)

charge carriers

c)

electrons

d)

atoms

e)

protons

5.

What is the unit for charge?

a)

Current

b)

Amperes

c)

Coulombs

d)

Ohms

e)

Negative

6.

If the total current (Itotal) is measured to be 0.02 A, What is the voltage measured at R1?

a)

2 V

b)

3 V

c)

5 V

d)

9 V

7.

If a fourth bulb is added, the resistance of the circuit will _____.

a)

decrease

b)

increase

c)

remains the same

d)

become twice as much

8.
What happens when you add a second bulb to a series circuit?
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
9.

State the equation that links charge flow, current and time

a)

current = time x charge flow

b)

time = current x charge flow

c)

charge flow = current x time

d)

charge flow = current / time

10.

What happens when you add a second bulb to a parallel circuit?

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

11.

State and equation that links gravitational potential energy, mass and gravitational field strength and height.

a)

mass = gravitational potential energy x gravitational field strength/height

b)

gravitational field strength= height / mass x gravitational potential energy

c)

gravitational potential energy = mass x gravitational field strength x height

d)

height = gravitational field strength / mass / gravitational potential energy

12.

State and equation that links power, work done and time.

a)

time = power x workdone

b)

power = work done / time

c)

work done = power / time

d)

power = work done x time

13.

state and equation that links power, potential difference and current

a)

power = potential difference/ current

b)

power = current / potential difference

c)

power = current x potential difference

d)

current = potential difference x power

14.

State the equation that links power, current and resistance

a)

resistance = current x power

b)

power = current2 x resistance

c)

power2 = current x resistance

d)

power = current x resistance2

15.

State the equation that links energy, charge and potential difference

a)

energy = charge x potential difference

b)

energy = charge / potential difference

c)

energy = potential difference / charge

d)

charge = energy x potential difference

16.
When plants convert the sun's energy into food, which type of energy is it?
a)
kinetic
b)
chemical
c)
thermal
d)
radiant
17.
What kind of energy is represented in this picture?
a)
Thermal
b)
Potential
c)
Nuclear
d)
Mechanical
18.
What kind of energy does this device use?
a)
Chemical
b)
Electrical
c)
Thermal
d)
Chemical
19.
A battery converts what type of energy to another?
a)
sound to kinetic
b)
light to heat
c)
mechanical to electrical
d)
chemical to electrical
20.
What is the work output of a machine that has a work input of 2,800 Joules and an efficiency of 92.3%? 
a)
2,690J
b)
92.3J
c)
0.0082J
d)
2,584.4
21.
The law of conservation of energy states that when one form of energy is converted into another,
a)
energy is destroyed in the process
b)
no energy is destroyed in the process
c)
energy is created in the process
d)
some amount of energy cannot be accounted for
22.
Watts is the same as...
a)
Joules per second
b)
Voltage per second
c)
Current per second
23.
At the start of a ski jump, a skier begins at rest at the top of a hill. What types of energies are present?
a)
Kinetic
b)
Gravitational
c)
Kinetic & Gravitational
d)
Gravitational & Internal
24.
As the skier goes down the hill, ________ energy increases while _______ energy decreases.
a)
Gravitational; Kinetic
b)
Kinetic; Gravitational
c)
Elastic; Kinetic
d)
Kinetic; Elastic
25.
A 24 Newton force was used to push a crate a distance of 4 meters. Calculate the work done on the crate.
a)
6 Joules
b)
28 Joules
c)
96 Joules
d)
60 Joules
26.

Aniela bench presses 145-lbs five times in 20 seconds.

Belinda bench presses 145-lbs five times in 10 seconds.

a)

Aniela did more work.

b)

Belinda did more work.

c)

Aniela and Belinda did the same amount of work.

d)

It depends who was bigger.

27.

Alex bench presses 145-lbs five times in 20 seconds.

Amber bench presses 145-lbs five times in 10 seconds.

a)

Alex has more power

b)

Amber has more power

c)

Both Alex and Amber have the same power

d)

It depends who has the most mass.

28.
A motor does 6,800 Joules of work raising an injured man off of Camelback Mountain onto a helicopter. The average power of the motor during the airlift was 750W. How long did it take to airlift the patient?
a)
0.110 seconds
b)
7.5 seconds
c)
9.07 seconds
d)
11.1 seconds
29.

Step-up transformers... (select all that apply)

a)

reduce the current

b)

increase the current

c)

increase the potential difference

d)

decrease the potential difference

30.

Electrical energy enters the home at...

a)

25,000 V

b)

132 kV

c)

230 V

d)

240 V

31.

Electrons quickly going back and forth in place is _________ current.

a)

alternating

b)

direct

c)

electricity

d)

forward

32.

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

33.

Step-down transformers...

a)

improve the efficiency of the national grid

b)

reduce the voltage to a safe level for the home

c)

both

d)

neither

34.

Step-down transformers... (select all that apply)

a)

reduce the current

b)

increase the current

c)

increase the potential difference

d)

decrease the potential difference

35.

Using the passage and diagram, what kind of resource is being presented?

Falling or flowing water from a big river has a lot of energy. We can harness this by forcing the water through a pipe. As the water flows through the pipe it turns the blades of a turbine which spins an electric generator. As long as the water is flowing, the generator will be able to provide electricity.

a)

Hydropower

b)

Tidal

c)

Waves

d)

Geothermal

36.
Geothermal energy is energy from 
a)
the sun
b)
heat from deep in the earth
c)
wind
d)
inexhaustable
37.

Which of the following are renewable energy resources?

a)

Solar

b)

Nuclear

c)

Tidal

d)

Wind

e)

All of the above

38.

density =

a)

volume / mass

b)

mass / volume

c)

weight / volume

d)

volume / weight

39.

What do biomass and coal have in common?

a)

They are both renewable

b)

They both produce carbon dioxide

c)

The are both made from sea creatures

d)

They are both non renewable

40.

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

41.

When you increase the temperature of an unconfined material, what changes? Select all that apply.

a)

Mass

b)

Volume

c)

Density

d)

Average energy per particle

42.

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

43.
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
44.
The following liquids are poured together in a beaker: alcohol (density=0.79), corn syrup (density=1.38), water (density=1.0), and cooking oil (density=0.93).  Which of these liquids will sink to the bottom of the beaker?
a)
alcohol
b)
corn syrup
c)
water
d)
cooking oil
45.
What is the density of a liquid that has a mass of 27g and a volume of 30ml?
a)
0.9 g/ml
b)
3 g/ml
c)
57 g/ml
d)
810 g/ml

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