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SFP Semester 2 Midterm

Total questions: 79

Worksheet time: 4hrs 47mins

Name
Class
Date
1.

Zeroth law of thermodynamics is:

a)

Kinetic energy of molecules of a gas is zero

b)

Ideal gas does not contain molecules

c)

If two systems are thermal equilibrium third one is also in equilibrium

d)

Absolute zero temperature cannot be obtained

2.
The SI unit for measuring heat is the 
a)
pascal
b)
newton
c)
Joule
d)
calorie
3.
Thermodynamics is the study of what?
a)
The transfer of energy
b)
The creation of energy
c)
The speed of reactions 
d)
The affect of heat on the speed of a reaction 
4.

What quantity of heat is required to raise the temperature of 450 grams of water from 15°C to 85°C? The specific heat capacity of water is 4.18 J/g/°C.

a)

131670 J

b)

159885 J

c)

-131670 calories

d)

none of the above

5.
My coffee and the creamer have the same temp.  My cofee and the cup have the same temp. So...Creamer and cup have same temp.
a)
Zeroth Law
b)
First Law
c)
Second Law
d)
Third Law
6.
In heat transfer, heat always flows from the _______________ substance to the _______________ substance.
a)
Hotter to colder
b)
Colder to hotter
c)
Hotter to hotter
d)
Colder to colder
7.

A measure of the amount of disorder or randomness in a system.

a)

Entropy

b)

Exothermic

c)

First Law of Thermodynamics

d)

Heat engine

8.
The _____ Law of Thermodynamics says that heat always flows from an object with a higher temperature to an object of lower temperature naturally
a)
Zeroth
b)
First
c)
Second
d)
Third
9.

The average kinetic energy of the molecules in an ideal gas is

a)

directly proportional to the square root of the absolute temperature.

b)

directly proportional to the absolute temperature.

c)

independent of the absolute temperature.

d)

inversely proportional to the absolute temperature.

10.

Which one the explanations of the absolute zero of temperature is a wrong one.

a)

The absolute zero of temperature is –273.15 °C

b)

0K

c)

At absolute zero of temperature, the substance has maximum internal energy

d)

At absolute zero of temperature, the substance has minimum internal energy.

11.

The ability to do work or produce heat is called

a)

Endothermic

b)

Exothermic

c)

Energy

d)

Temperature

e)

Heat

12.

The measure of random motions of the molecules of a substance is known as the substance’s

a)

Endothermic

b)

Exothermic

c)

Energy

d)

Temperature

e)

Heat

13.
A thermometer measures temperature which is best described as
a)
heat movement of particles
b)
average kinetic energy of particles
c)
calorimetry experiment
d)
specific heat of a substance
14.
The __________ law of thermodynamics states that entropy is always increasing. 
a)
first
b)
second
c)
third
d)
zeroth
15.
Which phase of matter has the greatest motion and least orderly arrangement?
a)
solid
b)
liquid
c)
gas
16.

Measuring energy by measuring temperature changes of water

a)

exothermic

b)

enthaply

c)

heat of fusion

d)

calorimetry

17.

The amount of energy required to raise the temperature of 1 gram of a substance by 1o C is known as:

a)

Specific heat capacity

b)

Heat of fusion

c)

Heat of vaporization

d)

Melting point

18.
A substance with a high specific heat:
a)
Is always extremely hot.
b)
Requires a lot of energy to become hot.
c)
Is not heavy.
d)
Does not requires a lot of energy to become hot.
19.
The sun shines down on this family as the play on the beach.
a)
conduction
b)
convection
c)
radiation
20.
A group of friends gather around a fire to stay warm.
a)
conduction
b)
convection
c)
radiation
21.

Walking on the warm sand with your bare feet.

a)

conduction

b)

convection

c)

radiation

22.
Blow drying your wet hair.
a)
conduction
b)
convection
c)
radiation
23.
Which direction will the heat flow while this person holds a hot cup of tea?
a)
from the cup to her hand
b)
from her hand to the cup
c)
no heat is transferred
24.
Which direction will the heat flow while this ice cap melts?
a)
there is no heat transfer
b)
from the icecap to the water
c)
from the water to the icecap
25.
Warm air rises and the cool air sinks.
a)
conduction
b)
convection
c)
radiation
26.
The baby chickens are kept warm from the heat lamps.
a)
conduction
b)
convection
c)
radiation
27.
In this experiment, the WARM red dye and the COLD blue dye was placed in the water at the same time. The warm red dye rose to the top while the cold blue dye sank to the bottom.
a)
conduction
b)
convection
c)
radiation
28.
The chocolate bunny and the iron.
a)
conduction
b)
convection
c)
radiation
29.
The chocolate bunny and the blow dryer.
a)
conduction
b)
convection
c)
radiation
30.
The chocolate bunny and the lamp.
a)
conduction
b)
convection
c)
radiation
31.

The law stating that energy is neither created nor destroyed; it only changes form. It is also known as the law of conservation of energy.

a)

First Law of Thermodynamics

b)

Second Law of Thermodynamics

c)

Third Law of Thermodynamics

d)

Fourth Law of Thermodynamics

32.

A law stating that all spontaneous processes result in an increase in the total entropy of the system and its surroundings.

a)

First Law of Thermodynamics

b)

Second Law of Thermodynamics

c)

Third Law of Thermodynamics

d)

Fourth Law of Thermodynamics

33.

How many electrons have been removed from a positively charged electroscope if it has a net charge of 7.5x10-11 C?

a)

7.5x10-11 electrons

b)

2.1x10-9 electrons

c)

1.2x108 electrons

d)

4.7x108 electrons

34.

The force exerted on a particle with a charge of 5.0x10-9 C by a second particle that is 4 cm rgaway is 8.4x10-5 N. What is the charge of the second particle?

a)

4.2x10-13 C

b)

2.0x10-9 C

c)

3.0x10-9 C

d)

6.0x10-5 C

35.

Three charges, A, B, and C, are located in a line, as shown above. What is the net force on charge B?

a)

78 N toward A

b)

78 N toward C

c)

130 N toward A

d)

210 N toward C

36.

What is the charge on an electroscope that has

an excess of 4.8x1010 electrons?

a)

3.3x10-30 C

b)

7.7x10-9 C

c)

4.8x10-10 C

d)

4.8x1010 C

37.

Two charged bodies exert a force of 86 N on each other. If they are moved so that they are six times farther apart, what is the new force that they will exert on each other?

a)

2.4 N

b)

14 N

c)

86 N

d)

5.2x102 N

38.

Two equally charged bodies exert a force of 90 N on each other. If one of the bodies is exchanged for a body of the same size, but three times as much charge, what is the new force that they will exert on each other?

a)

10 N

b)

2.7x102 N

c)

30 N

d)

8.1x102 N

39.

How can acquiring charge be described at a microscopic level?

a)

It is a process of balancing the charge on an atom.

b)

It is the process of removing electrons from the nucleus

c)

It is the process of transferring atoms

d)

It is the process of transferring electrons

40.

Explain what is meant by an electric field

a)

Space in which a charge has an electric potential energy

b)

The field produced by an electric charge

c)

Area where a charge experiences a force

d)

The electric force per unit charge

41.
In the diagram below, P is a point near a negatively charged sphere. Which direction best represents the direction of the electric field at point P?
a)
Right
b)
Left
c)
Up 
d)
Down
42.
At which point is the electric field the strongest
a)
A
b)
B
c)
C
d)
D
43.
At which point is the electric field the weakest?
a)
A because it is the furthest away
b)
A because the field lines are further apart
c)
C because the field lines are further apart
d)
C  because it is the furthest away
44.

Suppose a hollow metal sphere has a large negative charge on it. The electric field strength inside the sphere is

a)

large and positive.

b)

zero.

c)

large and negative.

d)

weak and positive.

45.
In a series circuit which of the following is the same  throughout the circuit
a)
Resistance
b)
Voltage
c)
Current
d)
None of the above
46.
In a series circuit which of the following will vary based on the resistor
a)
Resistance
b)
Voltage
c)
Current
d)
None of the above
47.

A circuit with 3 resistors, 10 Ohms, 30 Ohms and 20 Ohms are in series. What is the total resistance

a)

30 Ohms

b)

0.18 Ohms

c)

60 Ohms

d)

5.45 Ohms

48.

A circuit with 3 resistors, 10 Ohms, 30 Ohms and 20 Ohms are in parallel. What is the total resistance

a)

30 Ohms

b)

0.18 Ohms

c)

5.45 Ohms

d)

100 Ohms

49.
3 resistors are connected to a 9 V battery n a series circuit, the first resistor uses 6 V, the second uses 2 V. How much voltage does the third resistor use?
a)
1 V
b)
2 V
c)
3 V
d)
9 V
50.

What is the total voltage for this circuit?

a)

30 v

b)

60 v

c)

90 v

d)

180 v

51.

What is the resistance at R2?

a)

5 ohms

b)

10 ohms

c)

25 ohms

d)

50 ohms

52.
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
53.
If the battery produced 12.6 Volts and what would be the current flow be for a 6 Ohm resistor
a)
2.1 Amps
b)
2.4 Amps
c)
1.71 Amps
d)
15 Amps
54.

Find the total resistance.

a)

12 Ω

b)

6 Ω

c)

18 Ω

d)

3.5 Ω

55.
Assuming each resistor has the same resistance, which resistor will have the greatest current?
a)
R1
b)
R5
c)
R6
d)
R7
56.

Which diagram best fits this description: A circuit with a battery connected to four resistors, R1, R2, R3, and R4, as follows. Resistors R1 and R2 are connected in parallel with each other, resistors R3 and R4 are connected in parallel with each other, and both parallel sets of resistors are connected in series with each other across the battery.

a)
b)
c)
d)
57.

Four resistors are connected across an ideal dc source of V = 8.0 V, as shown in the figure. Assume all resistances shown are accurate to two significant figures. What is the current through the 9.0-Ω resistor?

a)

1.0 A

b)

0.67 A

c)

0.50 A

d)

0.90 A

58.

If emf of the ideal battery is V = 100 V, what is the potential difference across R5 for the circuit shown in the figure?

a)

19 V

b)

40 V

c)

75 V

d)

77 V

59.

How is electrical power calculated?

a)

Voltage X Current

b)

I X V

c)

Potential Difference X Current

d)

V divided by I

60.

What is the unit of Electrical Power?

a)

Joule

b)

Watt

c)

Where

d)

Amp

61.

A heater has a power rating of 2000W, if it's left on for 5 hours, and each unit of electricity costs 10cents, how much is the cost?

a)

$1

b)

$2

c)

$10

d)

$2.50

62.

Calculate the voltage applied when a 60 watt light-bulb uses a current of 5 amps

a)

300 volts

b)

30 volts

c)

12 volts

d)

0.08 volts

63.
In this circuit, what object(s) are the load?
a)
the battery
b)
the blue wires
c)
the LEDs
64.

Which leg of the LED is the positive (cathode) side?

a)

The longer one

b)

The shorter one

c)

There is no positive side

d)

They are both positive, I'm positive of it.

65.
What is this called? 
a)
Jumper wires
b)
Circuit
c)
Battery leads
d)
Breadboard
66.

Which picture (left or right) shows the correct way the battery wires should be attached?

a)

Left

b)

Right

c)

They are both wrong

d)

They are both correct

67.

Resistor symbol is

a)
b)
c)
d)
68.

Battery symbol is

a)
b)
c)
d)
69.
In a parallel circuit which of the following is the same value throughout the circuit?
a)
Voltage
b)
Current
c)
Resistance
d)
Charge
70.
What happens to my total resistance as I add more resistors to a parallel circuit?
a)
Increases 
b)
Decreases
c)
Stays the same
d)
No one really knows
71.
In a parallel circuit which of the following varies based on the amount of resistance
a)
Voltage
b)
Current
c)
Ohms Law
d)
Charge
72.
In a parallel circuit which of the following is the same value throughout the circuit?
a)
Voltage
b)
Current
c)
Resistance
d)
Charge
73.
Which best describes a parallel circuit?
a)
Electricity flows along one pathway.
b)
The flow of electricity comes from one source. 
c)
Electricity flows along more than one pathway. 
d)
The flow of electricity comes from more than one source. 
74.
What is one benefits of using a parallel circuit?  
a)
It gets confusing.
b)
There are no problems.
c)
If one goes down, it does not affect the others. 
d)
Porque es para llelio. 
75.
What is the voltage drop for each resistor?
a)
9 V: all resistors have the same voltage in a parallel circuit
b)
9V: there is only one resistor in this circuit
c)
Trick question! They all have different voltages!
d)
Trick question! They all have the same current!
76.
The current going through the 180 ohm resistor is 
a)
0.05 amps
b)
0.2 amps
c)
0.1 amps
d)
20 amps
77.
The total resistance of this circuit is 
a)
25.7 ohms
b)
315 ohms
c)
324 ohms
d)
90 ohms
78.
As the number of resistors increase, the total resistance ___________ and the total current ____________
a)
increases, decreases
b)
decreases, increases
c)
increases, increases
d)
decreases, decreases
79.

What is the total resistance of this circuit?

a)

155 Ω

b)

21.63Ω

c)

40.90

d)

31.94 Ω

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