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WorksheetsPhysics Interim Review
Total questions: 50
Worksheet time: 25mins
Which particles make up an atom? (pick more than one!)
positrons (+)
electrons (-)
neutrons (0)
protons (+)
neutrons (-)
When a charge is transferred to an insulator...
the charge will spread throughout the object
the charge will remain at the location it was transferred
the charge will dissipate
When a charge is transferred to an conductor...
the charge will spread throughout the object
the charge will remain at the location it was transferred
the charge will dissipate
Objects become negatively charged by:
losing protons
gaining electrons
gaining neutrons
losing electrons
Objects become positively charged by:
losing protons
gaining electrons
gaining neutrons
losing electrons
Attracting a soda can with a charged balloon is charge by:
friction
conduction
induction
transduction
Gaining a static charge by rubbing your feet on the carpet is charge by...
friction
induction
conduction
tranduction
A student touches a charged rod to a metal plate. This results in charge by...
friction
induction
conduction
transduction
Opposite charges:
repel
attract
do not interact
repel or attract depending on the mass of the charges
Like charges:
repel
attract
do not interact
repel or attract depending on the mass of the charges
When charges interact with neutral objects, they can...
only repel
only attract
attract or repel
not interact
Coulomb's Law says that electrical force is _______ proportional to the charge of the two objects
directly
indirectly
not
Coulomb's Law says that electrical force is _______ proportional to the distance between the two objects
directly
inversely
not
exponential & inversely
Which other force has an equation with the same set up as electrostatic force?
strong nuclear force
centripetal force
gravitational force
normal force
In the Coulomb's Law formula, "k" is:
a variable
the mass of one of the two objects
the electrostatic constant
equal to 6.67 x1023
If you double the charge of both objects, what happens to the electrostatic force between them?
It is quadrupled
It is doubled
It is halved
It is not changed
If you triple the distance between 2 objects, what happens to the electrostatic force between them?
It decreases by 1/3
It is tripled
It decreases by 1/9
It is not changed
In order for current to flow, there must be _________ in electrical potential energy
a difference
no difference
a lack
Click each variable that is correctly labeled:
Voltage, V, volts
Current, q, coulombs
Resistance, Ω, ohms
Power, W, joules
Which helps ground an electrical current?
lightning rod
fuse
circuit
laser shark
Fuses & circuit breakers....
ground an electrical current
protect against electrical overloads
are optional in a building's electrical systems
Find the voltage of a circuit with 100 ohms and 50 amps.
150 V
5000 V
50 V
2 V
Which is the correct method to calculate electrical power?
V = IR
P = IR
P = IV
P = I/V
A 40 W bulb has 70 V applied to it. What will the current be?
0.57 A
110 A
2800 A
1.75 A
Click each device correctly matched to what it measures:
Voltmeter: voltage
Ammeter: power
Ammeter: current
Voltmeter: resistance
Which devices are correctly wired?
Voltmeter is wired in parallel
Voltmeter is wired in series
Ammeter is wired in parallel
Ammeter is wired in series
For a series circuit, total resistance is found by:
adding the resistances for all loads
multiplying the resistances for all loads
finding only one resistance (all are equal)
adding the reciprocals of the resistances for all loads
For a parallel circuit, equivalent resistance is found by:
adding the resistances for all loads
multiplying the resistances for all loads
finding only one resistance (all are equal)
adding the reciprocals of the resistances for all loads
What is constant in a series circuit?
voltage
resistance
current
power
What is constant in a parallel circuit?
voltage
resistance
current
power
Which of the following would produce alternating current (click more than one answer!)?
generator
battery
solar panel
wall outlet
Which of the following would produce direct current (click more than one answer!)?
generator
battery
solar panel
wall outlet
Which symbol represents a load/resistor (such as a light bulb)?
parallel lines
zig-zag lines
straight lines
none
Which symbol represents a voltage/power source?
small sets of parallel lines
zig-zag lines
straight lines
none
What kind of circuit is this?
series
parallel
compound
this is not a circuit - it is incomplete
What kind of circuit is this?
series
parallel
compound
this is not a circuit - it is not complete
Like magnetic poles:
attract
repel
do not interact
Opposite magnetic poles:
attract
repel
do not interact
Where is magnetic force strongest?
the center of the magnet
near the north pole only
near either pole
near the south pole only
Click each item necessary to make an electromagnet.
wire
battery
iron core
switch
ammeter
An electric motor converts ______ energy to _______ energy.
nuclear; mechanical
mechanical; electrical
electrical; mechanical
mechanical; nuclear
A coil of wire that current can pass through is:
a solenoid
an electromagnet
a generator
an electric motor
To make an electromagnet more powerful, one can (select as many as apply):
increase the current in the wire
replace the battery with one of higher voltage
increase the number of wire loops/coils
decrease the number of wire loops/coils
replace the battery with one of lower voltage
What would be the easiest way to increase the force applied by a current carrying wire in an electric motor?
increase the length of the wire
make the magnetic field more powerful
increase the current
reverse the current
A magnetic compass, placed near a live wire, will...
do nothing
spin
align with the current's magnetic field
magnetic fields are produced by:
charged particles in motion
motionless charged particles
permanent magnets
batteries
The act of moving a bar magnet through a coil of wire to produce current functions as a(n):
electric motor
electromagnet
solenoid
generator
Current-carrying wires produce:
magnetic fields
no field of any kind
electric fields
an electric and magnetic field
______________ uses a changing magnetic field to cause current to flow in a wire.
electrostatic induction
inertial confinement
electromagnetic induction
ferromagnetism
The magnetic field produced by an electric wire is strongest:
perpendicular to the direction of current flow
parallel to the direction of current flow
at all angles outward from any point on the wire
at 45 degrees to the direction of current flow
