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WorksheetsMCQ final exam
Total questions: 60
Worksheet time: 36mins
______________ collisions conserve momentum.
Elastic
Inelastic
Perfectly Inelastic
All
______________ collisions conserve momentum and energy.
Elastic
Inelastic
Perfectly Inelastic
All
______________ collisions have objects that stick together.
Elastic
Inelastic
Perfectly Inelastic
All
________ is the measure of a force that causes a rotation.
Torque
Inertia
Angular momentum
Lever arm
A positive torque is in the ________ direction.
clockwise
counter-clockwise
inward
outward
The symbol for electric charge is represented by the letter (a) .
The unit for electric charge is (a) .
Most objects are (a) charged because they have equal numbers of protons and electrons.
A positive and a negative charge will attempt to _______.
attract
repel
not interact
explode
Two like charges will attempt to _______.
attract
repel
not interact
explode
Electric field lines will always move __________ positive charges.
clockwise from
counter-clockwise from
inward to
outward from
__________ is the "electric pressure" that causes electrical charges to move.
Voltage
Current
Resistance
Power
__________ is the opposition to the flow of electrical charges.
Voltage
Current
Resistance
Power
In a series circuit, there is ______ path(s) for electricity to take.
0
1
2
3
A plane mirror produces a __________ image.
virtual, upright
virtual, inverted
real, upright
real, inverted
The object distance is __________ the image distance for a plane mirror.
greater than
less than
equal to
triple
For spherical mirrors, the focal length is _________ the radius of curvature.
double
half
triple
one third
If the image distance is greater than the object distance, the image is ________.
upright
inverted
enlarged
reduced
The __________ is the point at which the optical axis and mirror intersect.
focal point
center of curvature
vertex
focus
__________ mirrors have positive focal lengths.
Plane
Convex
Concave
Spherical
A (n) __________ image is one where the reflected rays of light actually intersect at a point, and it could be projected on a screen.
real
virtual
enlarged
reduced
________ is the symbol used to represent the height of the image.
ho
hi
do
di
If the image produced is pointing the same direction as the object, the image is considered __________.
real
virtual
upright
inverted
A magnification value that is greater than 1 means that the image is __________.
same
smaller
enlarged
A magnification value that is positive means that the image is __________.
real
virtual
enlarged
Which of the following is conserved in all cases?
kinetic energy
mechanical energy
non-mechanical energy
total energy
________________ energy is stored energy.
Kinetic
Potential
Non-mechanical
Light
A stretched rubber band demonstrates ______________ energy.
kinetic
gravitational potential
elastic potential
heat
Friction changes kinetic energy into __________________.
gravitational & chemical
heat & chemical
sound & chemical
heat & sound
Which is NOT a unit for power?
J/s
Nm/s
W
Jm
What is the SI unit for energy?
N
J
W
P
Power is defined as __________________.
work per unit of length
force times unit of length
work per unit of time
force times unit of time
An object with kinetic energy must be __________.
moving
falling
elevated
at rest
What are the differences between elastic and inelastic collisions?
In elastic collisions, kinetic energy is conserved; in inelastic collisions, it is not.
In elastic collisions, objects stick together; in inelastic collisions, they bounce apart.
In elastic collisions, momentum is conserved; in inelastic collisions, it is not.
In elastic collisions, objects will always permanently change shape; in inelastic collisions, objects do not change shape.
Which type of collision is most likely to occur when two billiard balls hit each other?
Perfectly inelastic collision
Elastic collision
Inelastic collision
None of the above
What is the equation for momentum?
p=mv
L= Iω
d= vm
a= rv2
The direction of an object's momentum is always the same as its direction of ___.
torque
acceleration
motion
net force
Friction is a force that:
Increases motion
Decreases motion
Has no effect on motion
Changes the direction of motion
An object has 20 protons and 25 electrons.
positive
negative
neutral
Two particles with opposite charges (a) each other.
Two particles with the same charge (b) each other.
What is the unit of electric charge?
Ampere
Coulomb
Ohm
Volt
The force between electric charges depends on...
the mass of the charges
the distance between charges
the amount of charge
the velocity of the charges
Which symbol represent the physics quantity of torque?
τ
Torque is defined as _____.
mass times velocity
force times lever arm
momentum times radius
force times time
mass times acceleration
The force that pulls objects toward the center of the Earth is called:
Magnetic force
Gravitational force
Electric force
Nuclear force
Which of the following is a characteristic of force?
It can only push objects
It can only pull objects
It can either push or pull objects
It has no effect on objects
What type of circuit is the image showing?
Parallel
Series
No circuit
Ω (Ohms)
V (Volts)
A (Amps)
W (Watts)
Faraday's Law
Tesla's Law
Edison's Law
Ohm's Law
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
If one of the charges doubles, what happens to the force?
it doubles
it gets cut in half
it quadruples
it is cut by 1/4
