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physics revew M.Noor

Total questions: 94

Worksheet time: 5hrs 52mins

Name
Class
Date
1.

Specific latent heat is the amount of energy required to change the state of 1 kg of a substance without changing its (a)   .

2.

Select the state changes that latent heat of fusion applies to.

a)

melting

b)

evaporating

c)

freezing

d)

condensing

e)

sublimation

3.

Select the state changes that latent heat of vaporisation applies to.

a)

melting

b)

evaporating

c)

freezing

d)

condensing

e)

sublimation

4.

Select the correct equations.

a)

thermal energy = specific latent heat / mass

b)

thermal energy = specific latent heat x mass

c)

mass = specific latent heat / thermal energy

d)

specific latent heat = thermal energy / mass

e)

mass = specific latent heat x thermal energy

5.

The diagram shows a heating curve for ice. Which line represents the ice melting?

a)

A

b)

B

c)

C

d)

D

e)

E

6.

Why are lines B and D flat?

a)

The ice is melting

b)

The ice is freezing

c)

All of the thermal energy is used to break the bonds

d)

They stopped the stopwatch

e)

They stopped heating the ice.

7.

The diagram shows a heating curve for ice. Which line represents the ice in a liquid state (water)?

a)

A

b)

B

c)

C

d)

D

e)

E

8.

The diagram shows a cooling curve for ice. Which line represents the ice in a liquid state (water)?

a)

A

b)

B

c)

C

d)

D

e)

E

9.

The diagram shows a cooling curve for ice. Which line represents the ice freezing?

a)

A

b)

B

c)

C

d)

D

e)

E

10.

The diagram shows a cooling curve for ice. Which line represents the ice in a solid form?

a)

A

b)

B

c)

C

d)

D

e)

E

11.

Which one of the following quantities is equivalent to 1 W?

a)

1 V/A

b)

1 Ω • m

c)

1 V • A

d)

1 V/Ω

12.

What potential difference is required across an 8.0-Ω resistor to cause 2.0 A to flow through it?

a)

4.0 V

b)

16 V

c)

8.0 V

d)

32 V

13.

A 200-W light bulb is connected across a 100-V dc power supply. What current will flow through this bulb?

a)

0.90 A

b)

0.36 A

c)

0.60 A

d)

2.0 A

14.

A light bulb operating at a dc voltage of 100 V has a resistance of 200 Ω. How much power is dissipated in this bulb?

a)

100 W

b)

60 W

c)

50 W

d)

200 W

15.

When 5.00 A is flowing through an 10.0-Ω device, how much power is being dissipated in the device?

a)

50.0 W

b)

250 W

c)

500 W

d)

2.50 kW

16.
What  is the formula to calculate heat energy required to raise the temperature of any substance?
a)
Q = m Cp ∆T
b)
Q = m Cp
c)
Q =  ½ m v
d)
m = Q Cp
17.
If the specific heat of water is 4,186 J/kg∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C? 
a)
-80,371.2 J
b)
44,938.6 J
c)
80,371.2 J
d)
112,575.9 K
18.
The specific heat is the amount of energy needed to raise the temperature one degree Celsius of 1 gram of a substance.
a)
True
b)
False
19.
The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams?
a)
12.82 °C
b)
24.12°C
c)
351 °C
20.
What is the symbol for Thermal Energy?
a)
Q
b)
T
c)
m
d)
Cp
21.
Water has a specific heat of 4184 J/KgºC.  Wood has a specific heat of 1760 J/KgºC.  What material needs more energy to raise the temperature 1ºC
a)
Wood
b)
Water
c)
Both are the same
22.
A high specific heat means...
a)
It heats up quickly with energy added
b)
It requires more energy to change temperature
23.
You have 20 g of water with specific heat of 4.18 J/gŸ°C.  The temperature changes from 25° C to 20° C.  How much heat energy (Q) moves from the water to the surroundings?
a)
418 Joules
b)
209 J
c)
83 J
d)
4.18 J
24.
How does heat flow?
a)
Always from cold to warm
b)
Always from warm to cold
c)
Both warm to cold & cold to warm
d)
It depends on the temperature
25.
The amount of energy required to raise the temperature 1ºC for every kilogram is called____?
a)
Thermal Energy
b)
Specific Heat
c)
Temperature
d)
Kinetic Energy
26.
What is the equation to measure change in Thermal Energy?
a)
Q=mc∆t
b)
Q=mc
c)
Q= ∆mct
d)
m=QC
27.
When a  piece of aluminum foil is taken out of the oven and cools from 100° C to 50°C, What is the change in temperature?
a)
50°
b)
0°
c)
100°
d)
150°
28.
The specific heat of aluminum is 0.21 cal/g°C.  How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?
a)
105 J
b)
10.5 J
c)
1.05 J
d)
50 J
29.

Which of the following is an example of heat transfer by Conduction?

a)

Burning your fingers on a hot iron.

b)

Heat from a heater warming up your whole house

c)

Standing by a campfire and feeling the heat.

d)

All of the above.

30.

What is Radiation?

a)

When heat is passed from particle to particle through an object.

b)

When particles get heated, expand, and become less dense.

c)

When heat transfers by waves through empty space.

31.

What is Convection?

a)

When heat is passed from particle to particle through an object.

b)

When particles get heated, expand, and become less dense.

c)

When heat transfers by waves through empty space.

32.

What is Conduction?

a)

When heat is passed from particle to particle through an object.

b)

When particles get heated, expand, and become less dense.

c)

When heat transfers by waves through empty space.

33.

Which of the following is an example of heat transfer by Radiation?

a)

Burning your fingers on a hot iron.

b)

Heat from a heater warming up your whole house

c)

Standing by a campfire and feeling the heat.

d)

All of the above.

34.

How does heat move?

a)

From cooler objects to warmer objects.

b)

From warmer objects to cooler objects

c)

From metal objects to nonmetal objects

d)

Very quickly in all directions

35.
When Water Turns into gas it is called?
a)
Water Vapor
b)
Darth Vapor
c)
Melts
36.
Water will _________ when it gets cold enough, changing it from a LIQUID to a SOLID
a)
Melt
b)
Freeze
c)
Boil
37.
We measure ______ with Celsius or Fahrenheit degrees.
a)
Temperature
b)
Thermometer
c)
Barometer
38.
When a SOLID changes to a LIQUID, it
a)
Freezes
b)
Boils
c)
Melts
39.
Heat moves easily through materials called?
a)
Conductors
b)
Insulators
40.
When water is heated and CHANGES INTO A GAS it___________ 
a)
Boils
b)
Evaporates
c)
insulates
41.
Fur, cotton, wool, and plastic are examples of____________
a)
Conductors
b)
Insulators
42.
A device used to measure temperature
a)
Thermometer
b)
Barometer
c)
Blabometer
d)
hamamamometer
43.
When a liquid SLOWLY changes into a gas it_________
a)
Condenses
b)
Evaporates
44.
Which color absorbs the most light ?
a)
Light Blue
b)
White
c)
Black
45.
When an object is heated, it)_______
a)
Drops in temperature
b)
Gains Energy
c)
Its particles slow down
46.
Heat always goes from a ____ Temperature to a _____ temperature
a)
Warm to cold
b)
Cold to warm
47.

Find the diagram showing how temperature is related to the kinetic energy of particles in a material.

a)
b)
c)

It does not exist.

d)
48.

Which image represents conduction?

a)
b)
c)
d)
e)
49.

Which image represents radiation?

a)
b)
c)
d)
e)
50.

Which picture best represents thermal equilibrium?

a)
b)
c)
d)
e)
51.
What state(s) of matter are present at D-E?
a)
Solid-liquid
b)
Liquid
c)
Liquid-gas
d)
Gas-Solid
52.

Between which points is the temperature of the substance remaining constant (thermal equilibrium)?

a)

A-B only.

b)

A-B, C-D, E-F

c)

B-C only.

d)

B-C, D-E

53.
What line segment represents only the solid state?
a)
A-B
b)
B-C
c)
C-D
d)
D-E
54.

The amount of energy required to raise the temperature 1ºC for every kilogram is called____?

a)

Heat Energy

b)

Specific Heat

c)

Temperature

d)

Kinetic Energy

55.

What is the symbol for Specific Heat

a)

q

b)

t

c)

m

d)

c

56.

What is the equation to measure change in Heat Energy?

a)

q=mc∆t

b)

q=mc

c)

q= ∆mct

d)

m=qCc

57.

The specific heat of platinum is 0.133 J/g°C. How much heat(q) is released when a 10 g piece of platinum cools from 100°C to 50°C?

a)

66.5 J

b)

665 J

c)

0.0266 J

d)

0.665 J

58.

Which of the following equations is an equation for power, involving current and resistance?

a)

P= I/V

b)

P = IR

c)

P = IVR2

d)

P = I2R

59.

Which of the following is an equation for power, involving voltage and resistance?

a)

P = V/R

b)

P = V2/R

c)

P = VR

d)

P = V2R2

60.

The unit of electrical power is ...

a)

the watt

b)

el watio

c)

the wat

d)

el vatio

61.

What is the unit of electrical power?

a)

watt, W

b)

volt, V

c)

ampere, A

d)

ohm, Ω

62.
A current of 4 A flows through a 20 V car headlight bulb. Calculate the electric power.
 
Remember: I=P/V
a)
80 W
b)
200 W
c)
2.5 A
d)
4.55 A
63.
Calculate the electric power of an electrical appliance of 20 V having a resistance of 10 ohms.
 
Remember: I=V/R and P=VI
a)
200 W
b)
40 W
c)
2.5 A
d)
79.20 KJ
64.

Which wire has more resistance (long or short)?

a)
b)
65.

True or False: All materials have the same amount of resistance

a)

True

b)

False

66.

The unit of resistivity is

a)

Ω/m

b)

Ω/m2

c)

Ω.m

d)

Ω.m2

67.

What happens to the resistance when the temperature is increased?

a)

Increases

b)

decreases

c)

stay the same

d)

vary randomly

68.

What are the factors affecting resistance ?

a)

length

b)

Area of cross section

c)

nature of the material

d)

All of the above

69.

Unit of resistance is ?

a)

volts

b)

ohms

c)

Amperes

d)

Coulombs

70.

When the area of cross-section of the wire is doubled, keeping the length same, its resistance will ?

a)

Doubled

b)

Halved

c)

Subtracted by 2

d)

Added by 2

71.
What size resistor would produce a 3 Amp current flow with a 12 Volt battery
a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
72.
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
a)
25 V
b)
10 V
c)
2.5 V
d)
0.4 V
73.
Current times Resistance equals
 (I X R)
a)
Power
b)
Voltage
c)
Amperage
d)
Ohm
74.

Voltage divided by Resistance

(V / R)

a)

Current

b)

Power

c)

Ohms

d)

Watts

75.
How many Volts would we need to produce a current flow of 8 Amps through a 6 Ohm resistor
a)
12 volts
b)
24 volts
c)
1.3333
d)
48 volts
76.
This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?
a)
3 Amps
b)
192 Amps
c)
2 Amps
d)
4 Amps
77.
Identify the conductor below.
a)
cloth rag
b)
plastic bottle
c)
gold ring
78.
Identify the insulator below.
a)
aluminum foil
b)
paperclip
c)
rubber eraser
79.
Electricity is the flow of _________.
a)
protons
b)
neutrons
c)
electrons
80.
What type of circuit is pictured?
a)
series
b)
Parallel
81.
What type of circuit is pictured?
a)
series
b)
parallel
82.

An alarm clock draws 0.5 A of current when connected to a 120 volt circuit. Calculate its resistance.

a)

60Ω

b)

120Ω

c)

180Ω

d)

240Ω

83.

Speakers need a household voltage of 110 V to push a current of 5.5 A through them. What is the

resistance of the speakers?

a)

10Ω

b)

20Ω

c)

30Ω

d)

40Ω

84.

A current of 0.5 A flows in a circuit. Calculate the charge flowing through the circuit in one minute.

a)

0.5 C

b)

30 C

c)

120 C

85.

A large lightning bolt can carry up to 120000 A and 350 C. Calculate the time for which the current flows. 

a)

2.92 s

b)

0.0092 s

c)

2.92×10−3 min⁡2.92\times10^{-3}\ \min

d)

2.92×10−32.92\times10^{-3} s

86.
Charles' Law States...
a)
As Pressure goes up volume goes down
b)
As Pressure goes up temperature goes up
c)
As Volume goes up temperature goes up 
d)
As Pressure goes down volume goes down 
87.
Whose law states that as pressure goes up, volume goes down?
a)
Charles 
b)
Boyle
c)
Aglow
d)
Mazias 
88.
Boyle's Law shows the relationship between between which two factors of a gas?
a)
volume and pressure 
b)
temperature and pressure 
c)
pressure and temperature 
d)
Volume and mass
89.
What is the formula for Boyle's Law?
a)
P1V1=P2V2
b)
P1V1/P2V2
c)
P1V2=P2V1
d)
P1/V1=P2/V2
90.
Which container will have a lower pressure?
a)
left
b)
right
c)
they both have the same pressure
d)
I don't know
91.
What causes pressure?
a)
The walls of the container
b)
The vacuum in the container
c)
The collisions of the particles
d)
Atmospheric pressure acting on the outside walls
92.
What is the formula Charles' Law?
a)
V = T
b)
VT = VT
c)
T1 / V1 = T2 / V2
d)
V1 / T1 = V2 / T2
93.

A student measures the pressure and volume of an empty water bottle to be 1.4 atm and 2.3 L. She then decreases the pressure to 0.65 atm. What is the new volume?

a)

2.1 L

b)

5.0 L

c)

8.2 L

d)

3.9 L

94.

What is the pressure of a car tire that had an initial pressure of 1.8 atm but was heated from 38°C to 123°C?

a)

0.9 atm

b)

2.1 atm

c)

1.6 atm

d)

3.4 atm

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