WorksheetsENPHYS30 PRE-FINAL EXAM
Total questions: 60
Worksheet time: 1hrs 15mins
The current in the wires of a circuit is 120.0 milliAmps. If the battery was replaced by one with double the voltage (with no other replacements), then its new current would be _____ milliAmps.
60 milliAmps
120 milliAmps
240 milliAmps
No way to tell
The resistance of the light bulb is 15 ohms. If the battery was replaced by one with double the voltage (with no other replacements), then the light bulb resistance must _____.
Increase to 30 ohms
Not change
Decrease to 7.5 ohms
No way to tell
The current in the wires of a circuit is 60.0 milliAmps. If the battery was replaced by one with ⅓ of the original voltage (with no other replacements), then its new current would be _____ milliAmps.
20 milliamps
60 milliamps
180 milliamps
No way to tell
The rate at which a charge passes through given point is
Voltage
current
Resistance
Power
If the battery produced 12.6 Volts, what would be the current flow be for a 6 Ohm resistor?
2.1 Amps
2.4 Amps
1.71 Amps
15 Amps
What are the two necessary conditions for work to be done?
Force and Velocity
Force and Displacement
Force and Time
What is the unit for work?
Joules
Newton
Watts
Which of the given pictures shows that work can not done?
What are the factors affect gravitational potential energy?
Mass and Velocity
Mass, Acceleration due to gravity, and Height
Mass, Acceleration due to gravity and Time
What are the factors that can affect the power?
Work done and time
Work done and velocity
Work done and force
What will be the formula if we are finding the TIME using the formula of power?
Time = powerwork done
Time = work donepower
Time = work x power
What is the unit of work?
A. Kg m/s
B. Joules
C. Newton
D. meter
If 2.0 J of work is done in raising a 180 g apple, how far is it lifted? (Use g = 9.8 m/s2.)
1.11 x 10-2 m
1.13 m
11.11 m
90 m
Two horses pull a cart. Each exerts a force of 250.0 N at a speed of 2.0 m/s for 10.0 min. Calculate the power delivered by the horses?
0.5 kW
1 kW
5 kW
10 kW
Richard pulls a toy 3.0 m across the floor by a string, applying a force of 0.50 N. During the first meter, the string is parallel to the floor. In the next two meters, the string makes an angle of 30o with the horizontal direction. What is the total amount of work done by Richard on the toy?
1.000 J
1.299 J
1.366 J
1.500 J
A 50.0 kg student climbs 5.00 m up a rope at a constant speed. If the student’s power output is 200.0 W, how long does it take the student to climbs the rope? (Use g = 9.8 m/s2.)
1.25 s
3.64 s
12.25 s
24.5 s
How high is a-3.00 kg object that has 300 J of energy? (Use g = 9.8 m/s2.)
10 m
10.2 m
30.61 m
100 m
What is the unit for the period of a pendulum?
second
meter
m/s/s
Newton
Which of these does not affect the period of a pendulum?
length
gravity
mass
A pair of trapeze performers at the circus is swinging from ropes attached to a large elevated platform. Suppose that the performers can be treated as a simple pendulum with a length of 16 m. Determine the period for one complete back and forth cycle. (Useful equations are on the board).
2 sec
12 sec
8 sec
10 sec
A pendulum has a length of 4 meters. Determine the period for one complete back and forth cycle. (Useful formulas are on the board)
16 s
4 s
8 s
6 s
The highest point of the transverse wave.
amplitude
crest
trough
These are waves that travel through a medium like air, water and solids.
electromagnetic waves
mechanical waves
surface waves
It is the distance between two consecutive crests or troughs
amplitude
frequency
wavelength
It is the maximum displacement of a particle from its rest position
crest
trough
amplitude
wavelength
The type of EM wave with the longest wavelength
gamma rays
microwaves
radio waves
infrared
EM waves with the highest frequency and energy level
radio waves
microwaves
x rays
gamma rays
The color of light with the lowest frequency
red
violet
It is the highness or lowness of sound or a musical note.
Timbre
Loudness
Pitch
It is the unit used for frequency.
Hertz (Hz)
decibel (dB)
The ratio of force, acting perpendicular to the area, on which it acts known as…
Friction
Pressure
Force
Density
Which term defined as the sum of forces due to fluid pressure.
Buoyant force
net force
Resultant force
Pressure
Which fluid mechanics principle states that, a fluid exerts an upward buoyant force on a immersed object the same in magnitude to the weight of the volume of fluid displaced by the object?
Archimedes’
Bernoulli’s
Buoyancy
Pascal’s
Which fluid mechanics principle explained in terms of the law of conservation of energy?
Archimedes’
Bernoulli’s
Pascal’s
Poiseuille’s
Which two particles are attracted to each other?
Two neutrons
A proton and an electron
Two protons
An electron and a neutron
As two oppositely charged particles approach each other, what happens to the electrical force between them?
The attractive force increases
The magnitude of the electric force decreases
The repulsive force increases
The magnitude of their charges increases
Which is the value of the constant in Coulomb's equation?
k = 9·10-9
k = 9.8
k = 6.67·10-11
k = 9 ·109
A point charge (q1) has a magnitude of 3x10-6 C. A second charge (q2) has a magnitude of -1.5x10-6 C and is located 0.12 m from the first charge. Determine the electrostatic force each charge exerts on the other.
-4.52 x 10-3 N
-83 N
-2.81 N
-9 x 103 N
Two charges of equal magnitude give off a force of -441000 N when they are 1000 m away from each other. What are the charges magnitude?
5
7
9
11
It is a device to store charge.
Capacitor
Insulating Layer
Capacitor Plates
Terminal
The unit of capacitance.
Capacitor
Battery or Source of Energy
Capacitance
Farad
Which capacitor permitted more charge to flow, the 4,700 µF capacitor or 1,000 µF capacitor?
Charging
4,700 uF
1,000 uF
Discharging
Which capacitor lit longer, the 4,700 µF capacitor or 1,000 µF capacitor?
Charging
4,700 uF
1,000 uF
Discharging
In most capacitor, the plates have very large surface area, so that they can store less amount of charge.
True
False
The pitch of a sound wave relates to the wave's _________________.
Amplitude
Frequency
Wavelength
Period
What is the Doppler Effect?
A change in frequency due to the relative motion of a wave source and an observer
When a wave overlaps with another wave
When a wave bounces off of another object
When a wave bends due to traveling through a different medium
You are driving in a car and honk the horn at a person standing in the street. As you approach the person, what happens to the pitch of the horn according to you in the car?
It increases
It decreases
It stays the same because you are in the car moving with the sound.
Look at the picture. Who is experiencing a lower pitched sound?
Observer A
Observer B
There is no difference
when the frequency is higher what happens to the wavelength?
the wavelength gets longer
The wavelength gets shorter
the wavelength doesn't change
I have no idea
