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Y9 LC4 Physics

Total questions: 46

Worksheet time: 2hrs 33mins

Name
Class
Date
1.
what is the unit of measure for current?
a)
amps
b)
volts
c)
watts
d)
ohms
2.
what type of current comes from a battery?
a)
indirect
b)
alternating
c)
direct
d)
oscillating 
3.
The flow of electric charge through a circuit is...
a)
circuit
b)
current
c)
closed
d)
series
4.
According to this law, the current in a circuit equals the voltage difference divided by the resistance. 
a)
Law of Conservation of Energy 
b)
Ohm's Law 
c)
Law of Conservation of Charges
d)
Newton's First Law 
5.
This is the symbol for a _____?
a)
Fuse
b)
Resistor
c)
Heater
d)
Strip light
6.

How to you calculate the total resistance in a series circuit?

a)

R1 + R2+ R3

b)

R1 - R2 - R3

c)

1/R1 + 1/R2 + 1/R3

d)

R1 = R2 = R3

7.
What type of energy is stored in food and fuel?
a)
Chemical
b)
Thermal
c)
Potential
d)
Calories
8.
You hit the brakes on your bike. The bike slows down and the brake pads increase in temperature.
What type of energy decreased when you hit the brakes?
a)
kinetic energy
b)
gravitational energy
c)
elastic energy
d)
thermal energy
9.

A force of 200N is required to move a chair 50m. What is the work done?

a)

4 J

b)

0.25 J

c)

250 J

d)

10,000 J

10.
If 150 Joules of work is needed to move a box 10 meters, what force was used? 
a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
11.
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
12.

Which term is the unit of Power?

a)

Joule

b)

Newton

c)

Watt

d)

Hertz

13.

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

14.

As the power of a machine is increased, the time required to move an object a fixed distance...

a)

Decreases

b)

Increases

c)

Remains the same

d)

Not enough information given

15.

A weightlifter lifts a 2000 N weight a vertical distance of 0.5 meter in 0.1 second. What is the power output?

a)

0.0001 W

b)

0.0004 W

c)

10000 W

d)

40000 W

16.
Geothermal energy is energy from 
a)
the sun
b)
heat from deep in the earth
c)
wind
d)
inexhaustable
17.

An advantage of this energy resource is that it's reliable and predictable, a disadvantage is that power generated where there is little demand for electricity.

a)

biomass

b)

geothermal

c)

tidal

d)

wind

18.

Which of the following are fossil fuels? (select all that apply)

a)

Oil

b)

Wind

c)

Natural Gas

d)

Coal

e)

Nuclear

19.
Very concentrated forms of energy; power plants do not produce smog.
a)
Biomass
b)
Nuclear
c)
Coal
d)
Solar
20.

Electrical energy is provided to homes at what voltage?

a)

2500 V

b)

220V

c)

230 V

d)

240V

21.

Step-up transformers...

a)

Reduce the current

b)

Increase the current

c)

Increase the power

d)

Reduce the voltage

22.
Step-up transformers...
a)
improve the efficiency of the national grid
b)
reduce the voltage to a safe level for the home
c)
both 
23.
Step-down transformers...
a)
improve the efficiency of the national grid
b)
reduce the voltage to a safe level for the home
c)
both 
24.
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
25.
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
26.
Liquids have a __________ volume and ___________ shape.
a)
Definite, Definite
b)
Definite, Indefinite
c)
Indefinite, Definite
d)
Indefinite, Indefinite
27.
What is the state of the substance at point A?
a)
Liquid
b)
Solid
c)
Gas
d)
Plasma
28.
What phase change is happening at point B?
a)
Vaporization
b)
Sublimation
c)
Condensation
d)
Melting
29.

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

30.

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

31.

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

32.

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

33.

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

34.

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

35.
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
36.
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
37.
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
38.
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
39.
What is internal energy?
a)
The amount of heat an object contains.
b)
The sum of the kinetic and potential energy of the particles of a substance.
c)
Something we can measure easily.
d)
Something that does not exist.
40.
As the kinetic energy of the molecules in a substance increases, the temperature of the substance __________.
a)
increases
b)
decreases
41.
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. 
42.
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
43.

Weight =

a)

mass x gravity

b)

mass / gravity

c)

velocity / gravity

d)

velocity x gravity

e)

gravity / mass

44.

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

45.

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

46.

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

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