WorksheetsPhysics Multiple Choice Worksheet
Total questions: 95
Worksheet time: 48mins
The nucleus of an atom is charged
negatively.
positively.
both of these
none of the above
The electric charge of all electrons
vary from ion to ion.
are identical.
vary from atom to atom.
Compared to the mass of a proton, the mass of an electron is
very much less.
greater.
identical.
The vast numbers of electrons in a coin don't fly off the surface because
they are attracted by an equal number of protons.
they are strongly bonded to their atoms.
mutual repulsion is incomplete.
all of the above
Which force binds atoms together to form molecules?
electric
gravitational
centripetal
nuclear
none of the above
In an electrically neutral atom the number of protons in the nucleus is equal to the number of
electrons that surround the nucleus.
neutrons in the nucleus.
both of these
none of the above
If you strip electrons from an atom, the atom becomes a
positive ion.
different element.
negative ion.
To say that electric charge is conserved is to say that electric charge
is a whole-number multiple of the charge of one electron.
occurs in an infinite variety of quantities.
will interact with neighboring electric charges.
can neither be created nor destroyed.
A difference between electric and gravitational forces is that electric forces include
the inverse-square law.
repulsive interactions.
infinite range.
separation distance.
none of the above
When the distance between two charges is halved, the electric force between the charges
doubles.
is reduced by one-quarter.
quadruples.
is half.
none of the above
Two charged particles 1 m apart exert a 1-N force on each other. If the magnitude of each charge is doubled, the force on each particle will be
8 N.
4 N.
2 N.
1 N.
none of the above
Two charged particles 1 m apart exert a 1-N force on each other. If the particles are instead 0.25-m apart, the force on each particle will be
1.0 N.
2.0 N.
16.0 N.
4.0 N.
8.0 N.
To say that an object is electrically polarized is to say
its charges have been rearranged.
it is to some degree magnetic.
it is electrically charged.
it is only partially conducting.
its internal electric field is zero. sand
A balloon will stick to a wooden wall if the balloon is charged
negatively.
positively.
either of these
none of the above
A negatively-charged balloon touching a wooden wall
polarizes molecules in the wall.
pushes negative charge in the wall away from it.
pulls positive charge on the wall surface toward it.
all of the above
none of the above
Electric field lines about a point charge extend
outward when the charge is positive.
outward when the charge is negative.
in circles.
A proton and an electron placed in an electric field experience the same force. Which undergoes the greater acceleration?
electron
proton
both equally
none of the above
Electric charge distributes itself on conducting surfaces
with greater concentration on flat parts.
such that the electric field inside is zero.
both of the above
none of the above
Electric potential is measured in units of
volts.
amperes.
watts.
joules.
any or all of these
If you do 10 J of work to push 1 coulomb of charge into an electric field, its voltage with respect to its starting position is
10 V.
less than 10 V.
more than 10 V.
none of the above
When a battery does 24 J of work on 10 C of charge, the voltage it supplies is
2.4 V.
24 V.
240 V.
4.2 V.
none of the above
Just as water flows from high to low pressure, electric charge flows from
high resistance to low resistance.
high charge concentration to low charge concentration.
high to low voltage.
all of the above
none of the above
The flow of charge in a circuit depends on
adequate resistance.
adequate chemical action.
a potential difference.
all of the above
The amount of energy given to each coulomb of charge flowing through a 12-V battery is
12 J.
12 V.
12 A.
all of the above
none of the above
The electric current in a copper wire is normally composed of
electrons.
ions.
protons.
all of the above
An ampere is a unit of electric
pressure.
resistance.
current.
all of the above
none of the above
A coulomb of charge flowing in a bulb filament powered by a 6-volt battery is provided with
6 watts.
6 amperes.
6 newtons.
6 joules.
6 ohms.
Direct current is normally produced by a
generator.
battery.
both of these
neither of these
Alternating current is normally produced by a
battery.
generator.
both of these
neither of these
Electrical resistance is normally measured in
volts.
newtons.
joules.
amperes.
ohms
The electric resistance of a superconductor is
usually lower than ordinary resistors.
infinite.
zero.
none of the above
Current in a conductor can be increased by
reducing its resistance.
increasing the voltage across it.
both of these
neither of these
The current through a 10-ohm resistor connected to a 120-V power supply is
10 A.
120 A.
1 A.
12 A.
none of the above
The voltage across a 10-ohm resistor carrying a current of 5 A is
20 V.
10 V.
5 V.
more than 20 V.
2 V.
The value of a resistor that carries 2 A when connected to 10 V is
5 ohms.
more than 20 ohms.
10 ohms.
20 ohms.
2 ohms.
The purpose of the third prong on a common electric plug of an appliance is
to handle three-phase electricity.
to connect the appliance to zero ground potential.
a substitute for a safety fuse.
to provide an alternate live wire.
all of the above
If you plug a 110-V electric toaster into a 220-V outlet, current in the toaster will be about
twice what it should be.
more than twice what it should be.
half what is should be.
the same as if it were plugged into a 110-V outlet.
The current through two identical light bulbs connected in series is 0.25 A. The voltage across both bulbs is 110 V. The resistance of a single light bulb is
22 ohms.
440 ohms.
44 ohms.
220 ohms.
none of the above
Compared to the amount of current that flows from a battery and into a circuit, the amount of current that returns to the battery is
the same.
less.
greater.
dependent on the internal resistance of the battery.
A pair of 1-ohm resistors connected in series has a combined resistance of
2 ohms.
1/2 ohm.
1 ohm.
none of the above
A pair of 1-ohm resistors connected in parallel has a combined resistance of
1/2 ohm.
1 ohm.
2 ohms.
none of the above
The electric power of a lamp that carries 2 A at 120 V is
240 W.
60 W.
2 W.
1/6 W.
20 W.
What is the power rating of a device that draws 0.8 A when connected to 120 V?
60 W
15 W
120 W
96 W
12 W
What is the resistance of a 120-W incandescent lamp connected to a 120-V power supply?
144 ohms
60 ohms
100 ohms
1 ohm
120 ohms
If you break a bar magnet in half you'll
have four magnets.
have two magnets.
destroy its magnetic properties.
none of the above
Compared with the huge force that attracts an iron tack to a strong magnet, the force that the tack exerts on the magnet is
relatively small.
equally huge.
not enough information
The ultimate source of all magnetism is
moving electric charge.
tiny domains of aligned atoms.
ferromagnetic materials.
tiny bits of iron.
Every spinning electron is
a tiny magnet.
electrically charged.
both of these
none of the above
Surrounding every moving electron is
an electric field.
a magnetic field.
both of these
neither of these
Wood does not have magnetic properties because it contains no
moving electrons.
magnetic domains.
iron or other metals.
none of the above
A magnet will become weaker if it is
dropped on a hard surface.
held in a hot flame.
either
neither
When a bar magnet is broken in half, the strength of the four new poles relative to pole strength before breaking is
somewhat more.
half.
less than half.
the same.
Magnetic field lines about a current-carrying wire
extend radially from the wire.
circle the wire in closed loops.
both of these
none of the above
When a current-carrying wire is bent into a loop, its magnetic field inside the loop
becomes concentrated.
weakens.
cancels.
none of the above
The lift experienced by Maglev trains is due to magnetic
dipoles.
repulsion.
attraction.
Maximum magnetic force occurs when electrons move
in the same direction as the magnetic field.
opposite to the magnetic field direction.
at non-right angles to the magnetic field direction.
perpendicular to the magnetic field direction.
none of the above
When an electron passes through the magnetic field of a horseshoe magnet, the electron's
direction of motion is changed.
speed is increased.
both of these
none of the above
In which of these locations is cosmic ray intensity greatest?
Singapore
Toronto
Mexico City
all about the same
Voltage can be induced in a wire by
moving the wire near a magnet.
changing the current in a nearby wire.
moving a magnet near the wire.
all of the above
none of the above
When a bar magnet is thrust into a coil of wire, the coil
attracts the magnet as it enters.
repels the magnet as it enters.
both of these
none of the above
If you drop a bar magnet in a vertical copper pipe it will fall slowly because
it induces a magnetic field in the pipe that resists motion of the magnet.
of air resistance.
the copper is a good conductor of both electricity and magnetism.
of electron repulsion.
Which of these statements is true?
a battery produces ac and a generator produces dc
a battery produces dc and a generator produces ac
a battery and a generator produce dc
a battery and a generator produce ac
A topic that most underlies electrical studies and all of physics is
the conservation of momentum.
Newton's laws of motion.
the conservation of energy.
The rate at which a transformer transfers energy is called
transformer efficiency.
electromagnetic induction.
power.
Compared with the power input to an ideal transformer, the power output is
less.
greater.
either greater or less.
the same.
The principal difference between a step-up and step-down transformer is
different ratios of turns for each set of loops or coils.
different geometries.
step-up transformers can handle more current.
none of the above
The voltage across the input terminals of a transformer is 110 V. The primary coil has 50 loops and the secondary coil has 100 loops. The output is
220 V.
25 V.
110 V.
55 V.
none of the above
A certain transformer doubles input voltage. If the primary coil has 10 A of current, then the current in the secondary coil is
10 A.
2 A.
25 A.
5 A.
none of the above
A transformer for a laptop computer converts a 120-V input to a 24-V output. Compared with the number of turns on the primary coil, the secondary has
5 times as many turns.
the same number of turns.
1/5 as many turns.
none of the above
Electric and magnetic fields combine to produce
sound.
light.
both of these
none of the above
When we consider how frequently an oscillating system vibrates we're talking about
wavelength.
amplitude.
frequency.
period.
When we consider the time for an oscillating system to make a vibration we're talking about
amplitude.
period.
wavelength.
frequency.
When we consider the distance a pendulum swings to and fro we're talking about the pendulum's
period.
amplitude.
frequency.
wavelength.
If you double the frequency of a vibrating object, its period
is halved.
doubles.
is one-quarter.
The period of the second hand on a clock is
3600 s.
12 h.
1 s.
60 s.
1/60 s.
What moves from place to place in wave motion is
momentum.
energy.
pressure.
matter.
A wave oscillates up and down twice in 1 s. If the wave travels an average distance of 6 m in 1 s, its wavelength is
6 m.
0.5 m.
1 m.
3 m.
2 m.
A floating leaf oscillates up and down twice in 1 s as a water wave of wavelength 10 m passes by. What is the wave's speed?
more than 40 m/s
2 m/s
40 m/s
20 m/s
10 m/s
A boat at anchor is rocked by waves whose crests are 40 m apart and with wave speed 10 m/s. These waves reach the boat once every
400 s.
30 s.
0.25 s.
4 s.
The compressions and rarefactions in a longitudinal wave travel in
opposite directions.
the same direction.
neither of these
Which of the following is not a transverse wave?
sound
radio
light
all of the above
none of the above
Compressions and rarefactions are characteristic of
longitudinal waves.
transverse waves.
both of these
none of the above
Sound travels faster when the air is
warm.
cold.
neither of these
When sound travels faster higher in the air than it does closer to the ground, sound bends
upward.
downward.
neither of these
A bass fiddle is louder than a harp because of its
lower pitch.
sounding board.
thicker strings.
all of the above
none of the above
Wave interference occurs for waves of
water.
sound.
light.
all of the above
none of the above
Standing waves of sound are employed in a
flute.
clarinet.
guitar.
all of the above
none of the above
The number of nodes in a standing wave of two wavelengths, not including the endpoints, is
2.
6.
4.
3.
5.
Identical waves superimposed out of phase produce a wave of decreased
frequency.
wavelength.
amplitude.
all of the above
none of the above
Two tuning forks produce sounds of wavelengths 3.4 m and 3.3 m. Assuming the speed of sound is 340 m/s, the beat frequency produced is
4.0 Hz.
0.1 Hz.
1.0 Hz.
3.0 Hz.
2.0 Hz.
Two tuning forks produce sounds of wavelengths 3.4 m and 3.3 m. Assuming the speed of sound is 340 m/s, the beat frequency produced is
2.0 Hz.
0.1 Hz.
3.0 Hz.
4.0 Hz.
1.0 Hz.
Which doesn't belong to the same family?
infrasonic waves
ultrasonic waves
shock waves
longitudinal waves
radio waves
Compared to noise, musical sounds commonly have
periodic tones.
musical notes.
both of these
neither of these
A shock wave is produced when the speed of an object
exceeds the speed of sound in air.
greatly increases in amplitude.
matches the speed of sound in air.
none of the above
Musical tones are characterized by
partial tones
quality.
harmonics.
all of the above
none of the above
