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WorksheetsPhysical Science Midterm
Total questions: 75
Worksheet time: 38mins
A/An ____ is described as the flow of electric charge or current equal to one coulomb per second.
capacitor
ampere
capacitance
volt
What do control rods do in a nuclear reactor?
They absorb neutrons to stop the chain reaction.
They absorb excess energy from the reaction.
They control the temperature of the water.
The fuel pellets are stored there.
Which of the following would be the best insulator?
aluminum
copper
air
silver
In a step-up transformer, the number of turns of wire is greater in the ____ coil than in the ____ coil, and the ____ voltage exceeds the ____ voltage.
input, output, input, output
output, input, output, input
input, output, output, input
output, input, input, output
A ____ is described as a device that converts chemical energy to electric energy.
resistor
lightbulb
battery
capacitor
Renewable organic matter, such as wood and rice hulls, are examples of ____.
fission products
fossil fuels
biomass
nuclear fuels
A ____ is described as a device with specific resistance and is used to control current.
resistor
battery
parallel connection
series connection
The thermal energy obtained from a nuclear reactor is used to make ____.
fission products
electricity
nuclear waste
steam
Which of the following statements is true about electric forces?
Electric forces cause objects to repel or attract each other.
Electric forces cause objects to only repel each other.
Electric forces cause objects to only attract each other.
Electric forces have no effect on each other.
Current that does not reverse direction is called ______.
The transfer of energy that does NOT require matter is ______.
Electricity produced by falling water is called ______.
The number of turns on the primary coil of a step-down transformer ______ the number of turns on the secondary coil.
The function of a generator is to change ______.
When a pot of water is put on a stove, the water at the top gets hot primarily by ______.
The fuel used in a nuclear reactor usually comes from ______.
Which of the following is the correct sequence of strokes in a four-stroke engine?
compression, intake, exhaust, power
intake, exhaust, power, compression
intake, compression, power, exhaust
intake, power, compression, exhaust
charges repel, whereas charges attract.
Opposite, like
Like, opposite
Positive, negative
Negative, positive
Which factor will not affect the strength of a solenoid?
strength of current
adding an iron core
color of the wire
number of wraps
The chain reaction in a nuclear reactor is controlled by inserting the .
core
uranium
boron or cadmium rods
heat exchanger
The inside surface of the glass inside a vacuum bottle is coated with aluminum to prevent heat loss by
convection
combustion
radiation
conduction
is described as a property that determines how much current will flow for a given battery voltage.
Thermal energy
Resistance
Kilowatt-hour
Resistor
The region around a magnet where the magnetic forces act is the .
magnetic pole
electromagnetic pole
magnetic domain
magnetic field
When a conducting sphere is charged positively, initially the charge is deposited on the left side. However, due to the sphere’s conducting nature, the charge spreads uniformly throughout the surface of the sphere. Charge is uniformly distributed because:
charged atoms at the location of charge distribute throughout the surface.
excess electrons within the sphere move toward excess protons.
excess protons move from the location of charge to rest.
excess charge within the sphere moves out into the ground from the surface.
When you break an iron magnet into two pieces, you get
a piece of iron that is no longer magnetic
two north poles
two north poles and two south poles
two south poles
A/An ______ is described as the flow of charged particles.
electric current
electric potential difference
gravitational force
electric field
The rate at which an electrical device converts energy from one form to another is called ______.
voltage regulation
electrical power
electrical energy
electrical resistance
All of the following are good conductors of heat EXCEPT ______.
silver
copper
air
aluminum
One source of constant electric current is a ______.
dry cell
switch
coulomb
transformer
Current that does NOT reverse direction is called ______.
magnetic current
circuit current
direct current
alternating current
Which of the following is the correct relationship among power, current, and voltage?
E = P × t
V = P × I
P = I/V
P = I × V
When a closed tin is heated, the pressure inside it increases. This happens because:
The molecules now collide more with the walls of the tin than among themselves.
The number of molecules increases on heating.
The molecules move faster and each molecule strikes the walls of the tin more often.
The molecules become heavier and strike the walls of the tin harder.
A/An ______ is described as a closed loop or pathway that allows electric charges to flow.
parallel connection
series connection
electric circuit
conventional current
A material through which electrons do NOT readily flow is a(n) ______.
insulator
fuse
conductor
transformer
Electric charge that has accumulated on an object is referred to as ______.
current electricity
static electricity
current circuit
circuit electricity
A/An ______ is an energy unit used to measure electric energy use by power companies.
ohm
volt
ampere
kilowatt-hour
The function of an electric motor is to change ______.
electrical energy to chemical energy
chemical energy to electrical energy
electrical energy to mechanical energy
mechanical energy to electrical energy
The flow of electric charge or current equal to one coulomb per second is a/an ______.
volt
ampere
kilowatt hour
ohm
The domains in a magnet are ______.
positively charged
aligned according to magnetic fields
negatively charged
arranged randomly
What is the effect on the current in a simple circuit when both the voltage and the resistance are divided by 2?
multiplied by 2
no change
multiplied by 4
divided by 2
Electric current is produced when a spinning ______ shaft rotates magnets inside a generator.
combustion
steam
boiler
turbine
Heat is ______ energy that is transferred from one object at a certain temperature to another at a different temperature.
electromagnetic
thermal
solar
kinetic
Which of the following is not a risk of nuclear energy use?
radioactive waste
cold water pollution
expensive to build
hot water pollution
Petroleum, natural gas, and coal are the three kinds of _______.
nuclear waste
synthetic fuels
nuclear fuels
fossil fuels
An electromagnet is _______.
only operating when the current is on
a permanent magnet
attracts all metal substances
made with bar magnets
Energy from the Sun travels to Earth as _______.
combustion
chemical energy
mechanical energy
radiant energy
Fuel cells are powered by which of the following?
electricity
water
hydrogen gas
biomass
Electric companies usually sell electrical energy in units of _______.
watts
volts
kilowatt-hours
amperes
Temperature is a measure of _______ of the particles in an object.
the average potential energy
the average kinetic energy
the sum of the potential and kinetic energy
the difference between the potential and kinetic energy
Resistance is measured in a unit called the _______.
coulomb
ampere
volt
ohm
A device that increases or decreases voltage in a power line is a _______.
generator
transformer
commutator
motor
Some gauges on the dashboard of a car are ______.
step-down transformers
galvanometers
generators
step-up transformers
Solar collectors are parts of a(n) ______.
radiant heating system
active solar heating system
passive solar heating system
external combustion engine
Which of the following is the correct relationship among power, current and voltage?
P = I × V
V = P × I
V = I/R
P = I/V
Electromagnetic induction is the process of producing an electric current by moving a loop of wire ______.
around an iron core
through a magnetic domain
around a magnetic pole
through a magnetic field
The function of a generator is to change ______.
mechanical energy into electrical energy
electrical energy into chemical energy
electrical energy into mechanical energy
chemical energy into electrical energy
Current that reverses direction in a regular pattern is called ______.
magnetic current
circuit current
alternating current
direct current
Which is the transfer of thermal energy through direct contact of particles?
radiation
conduction
specific heat
convection
Which of the following is an example of a nonrenewable source of energy?
water
wind
coal
the Sun
______ offer the best hope for safe, long-term containment of radioactive wastes.
Ocean depths
Deep, stable rock deposits
Polar ice caps
Salt lakes
The south pole of a magnet ______.
attracts another south pole
attracts a north pole
repels a north pole
repels a paper clip
The location of the strongest magnetic field is the ______.
magnetic fields
magnetic poles
magnetic domains
center of the magnet
A heat engine ______.
changes mechanical energy into electrical energy
changes mechanical energy to thermal energy
changes kinetic energy into thermal energy
changes thermal energy into mechanical energy
A simple transformer consists of two coils of wire called the ______.
step-up and step-down generators
alternating and direct currents
primary and secondary coils
input and output loops
The location of the strongest magnetic forces is the ______.
magnetic fields
electromagnets
magnetic poles
magnetic domains
The magnetic field of a magnet is ______.
the same at all parts of the magnet
strongest at the center
strongest at the poles
weakest at the poles
Changing the current changes the ______ of an electromagnet.
charge
direction
strength and direction
strength
A circuit that has two or more branches for electrons to follow is a(n) ______.
parallel circuit
circuit diagram
series circuit
electron circuit
The part of a nuclear reactor in which the fuel is located is called the ______.
control rod
core
heat exchanger
turbine
A ______ is equal to 1000 watts delivered continuously for 3,600 seconds.
Ohm
Meters Per Second
Newton
What do hydroelectric dams, tidal energy, and wind energy systems have in common?
generators
turbines
steam
hot air
A/An ______ is a device that is used to measure currents.
electromagnetic
solenoid
motor
An area with excess electrons has a net ______ charge; an area with a deficit of electrons has a net ______ charge.
positive, neutral
negative, neutral
positive, negative
A circuit that has two or more separate paths for electrons to follow is a(n) ______.
circuit breaker
series circuit
electron circuit
The region around a magnet where the magnetic forces act is the ______.
magnetic domain
magnetic pole
electromagnetic pole
