WorksheetsIS PHSYICS 1-3
Total questions: 107
Worksheet time: 54mins
How many torr are there in one atmosphere?
1000
550
600
760
Two atoms of the same element will have the same number of protons. If they have a different number of neutrons, what are they called?
Ions
Isotopes
Allotropes
Isomers
Gauss' law of electricity, Gauss' law of magnetism, Faraday's law of induction, and Amperes' law form the basic equations of electromagnetism. This combination is collectively known as:
Coulomb's equations
Volta's equations
Fermi's equations
Maxwell's equations
The temperature of a gas measures the:
number of calories of heat present
average kinetic energy of the particles in the gas
exact number of particles in the gas
potential energy of the gas
What is a typical wavelength of an AM radio wave?
3000 meters
300 meters
30 meters
3 meters
Entropy is a measure of:
magnetization
disorder
temperature
heat
An electrical discharge ionizing the air around a conductor is called
Flux
Corona
Ozone
Field
Which of the following instruments should never have their test leads connected directly to a wall outlet:
ammeter
voltmeter
oscilloscope
frequency counter
The energy associated with the random molecular motion of the individual gas molecule.
friction
internal energy
temperature
potential energy
The principle that energy may be converted from one form to another but it cannot be either created or destroyed is:
First Law of Thermodynamics.
Second Law of Thermodynamics.
Third Law of Thermodynamics.
Principle of photoelectricity
What is the total resistance of three 15-ohm resistors connected in parallel?
10 ohms
8 ohms
7 ohms
5 ohms
Processes which occur without the addition or withdrawal of heat from the surrounding are called what?
adiabatic
isochoric
isobaric
isothermal
A color with a wavelength longer than that of yellow is
red
blue
violet
green
In SONAR, we use
ultrasonic waves
infrasonic waves
radio waves
audible sound waves
An oscilloscope is an instrument which allows us to see waves produced by
Visible light
X-rays
Sound
Gamma rays
The sound travels fastest in
solids
liquids
gases
none of these
Sound waves can undergo
reflection
refraction
interference
1 and 2 only
2 and 3 only
1 and 3 only
1, 2 and 3
Consider the following parts of spectra. Which one of the following is the correct sequence in which their wavelengths increase ?
Visible
Infrared
Ultraviolet
Microwave
4 - 3 - 1 - 2
4 - 1 - 2 - 3
3 - 2 - 1 - 4
3 - 1 - 2 - 4
Which one of the following is not electromagnetic in nature?
Cathode-rays
X-rays
Gamma-rays
Infrared-rays
'Pitch' is a characteristic of sound that depends upon its
intensity
frequency
quality
None of these
Which one of the following types of waves are used in a night vision apparatus?
Radio waves
Microwaves
Infra-red waves
None of the above
The earth's magnetic field is approximately
1 Tesla
2 Gauss
104 Tesla
0.5 Gauss
From a power station, the power is transmitted at a very high voltage because.
it is generated only at high voltage
it is cheaper to produce electricity at high voltage
electricity at high voltage is less dangerous
there is less loss of energy in transmission at high voltage
Magnets attract magnetic substances are iron, nickel, cobalt, etc. They can also repel
paramagnetic substances
ferromagnetic substances
diamagnetic substances
non-magnetic substances
A coin in a beaker filled with water appears raised. This phenomenon occurs because of the property of
reflection of light
refraction of light
total internal reflection of light
interference of light
When light waves travel from air to glass, which variables are affected?
Wavelength, frequency and velocity
Velocity and frequency only
Wavelength and frequency only
Wavelength and velocity only
Which one among the following is used to make periscope?
Concave lens
Concave mirror
Plane mirror
None of the above
The process of superimposing signal frequency (i.e., audio wave) on the carrier wave is known as
Transmission
Reception
Modulation
Detection
Light Emitting Diode (LED) converts
light energy into electrical energy
electrical energy into light energy
thermal energy into light energy
mechanical energy into electrical energy
The waves used in telecommunication are
IR
UV
Microwave
Cosmic rays
Television signals are
frequency modulated
amplitude modulated
both frequency and amplitude modulated
phase modulated
The most familiar form of radiant energy in sunlight that causes tanning and sunburning of human skin, is called
ultraviolet radiation
visible radiation
infrared radiation
microwave radiation
A perfect black body has the unique characteristic feature as
a good absorber only
a good radiator only
a good absorber and a good radiator
neither a radiator nor an absorber
A device that transforms electrical energy to mechanical energy is known as a
Generator
Magnet
Motor
Transformer
A transformer has 250 turns in its secondary coil. The secondary voltage is 10 V. If the transformer is connected to a 220 V source, how many turns does the transformer have in its primary coil?
5500
2500
500
11
What happens when parallel rays of light hit a smooth surface?
Diffuse reflection
Diffraction
Refraction
Regular reflection
Induced electric currents can be explained using which of the following laws?
Gauss's Law
Faraday's Law
Ohm's Law
Ampere's Law
Iron is what type of magnetic material?
diamagnetic
paramagnetic
ferromagnetic
non-magnetic
The focal length of a concave spherical mirror is equal to 1 meter. What is the radius of curvature of this mirror?
30 meters
0.2 meters
3 meters
2 meters
The collision between a photon and a free electron was first explained by which of the following scientists?
Einstein
Heisenberg
Compton
Bohr
The Tesla and the Gauss are units of measure of:
conductance
magnetic field strength
magnetic flux
electrical current
What is the name of the temperature and pressure conditions at which water can be in the solid, liquid and gas phases simultaneously?
Boiling Point
Freezing Point
Triple Point
Critical Point
When a metal becomes a superconductor, there is a tremendous decrease in its:
total volume
electrical resistance
length
density
The first law of thermodynamics is concerned with the conservation of
energy
momentum
charge
matter
The amount of heat required to change a boiling liquid to a gas at the same temperature depends on one of the following properties of the liquid
heat of fusion
heat of vaporization
temperature
density
Which one of the following is the name of a device used to measure voltage without drawing ANY current from the circuit being measured?
a wattmeter
a galvanometer
an ammeter
a potentiometer
A machine's output is 4000 joules and its frictional losses are 1000 joules. Which of the following is its efficiency?
25%
30%
75%
80%
One nanometer is equal to:
10-12 meters
10-11 meters
10-3 meters
10-9 meters
In what type of reference frame does Newton's law NOT hold true?
Non inertial frames
Inertial frames
Rest frames
Constant velocity frames
Who named the two kinds of electrical charges 'positive' and 'negative'?
Charles-Augustin de Coulomb
Benjamin Franklin
Alessandro Volta
Michael Faraday
What SI prefix is used to represent 10-18?
Femto
Pico
Deca
Atto
Heat transfer by mixing is more commonly known as what?
Mixing
Radiation
Conduction
Convection
Two parallel wires carrying currents in opposite directions will
attract each other
repel each other
cause an electric arc to form
not affect each other
Who invented the barometer?
Torricelli
Avogadro
Rutherford
Becquerel
The random motion of particles suspended in a fluid is called:
Boson Condensation
Fermi Motion
Brownian Motion
Pauli Motion
The most efficient heat engine that can operate between two temperature reservoirs T1 and T2 is
jet engine
internal combustion engine
Carnot engine
steam engine
The law that relates the electric field at the surface of a region to the amount of charge inside the region is called:
Coulomb's Law
Faraday's Law
Gauss' Law
Biot-Savart Law
The four underlying equations in electromagnetic theory are called:
Einstein's Equations
Maxwell's Equations
Newton's Equations
Faraday's Law
In an electromagnetic wave, what is the relative orientation of the magnetic and electric fields?
180 degrees
90 degrees
45 degrees
22.5 degrees
The anti-particle to an electron is:
proton
positron
neutron
anti-proton
How much energy is consumed if a 100 watt light bulb is operated for 10 MINUTES?
30,000 J
40,000 J
50,000 J
60,000 J
How much current does a 1500 Watt heater draw if supplied with a 120 Volt source?
11.5 amps
14.5 amps
13.5 amps
12.5 amps
The area of thermodynamics concerned with the measuring of thermal properties is called what?
Cryogenics
Calorimetry
Thermochemistry
Thermodynamics
Heat is transferred from the sun to the earth primarily by:
conduction
convection
radiation
condensation
Who discovered electromagnetic induction?
Newton
Maxwell
Einstein
Faraday
Who received the Nobel Prize in Physics in 1929 for his postulation of the wave nature of electrons?
De Broglie
Heisenberg
Schrödinger
Planck
Which one of the following laws best describes the operation of an electric generator?
Ampere's Law
Gauss' Law
Ohm's Law for Conductors
Faraday's Law of Induction
A wave and its reflection produce a standing wave with the distance from NODE to nearest ANTINODE of 4 meters. The wavelength of this wave is:
4 meters
8 meters
12 meters
16 meters
The rate at which electrical energy is used is measured in
volts
amperes
joules
watts
Infrared rays are absorbed best by which one of the following.
bodies of air
white bodies with rough surfaces
mirrors
black bodies with rough surfaces
Which of the following terms refer to the amount of heat needed to raise the temperature of a unit mass of a substance through one degree?
Heat of fusion
Liquification heat
Internal heat
Specific heat
In a dc circuit, how do electrons move?
with a fast drift velocity.
in alternate directions.
near the speed of light.
in one direction
In electrical terms, power has what units?
joule/coulomb
amp/ohm
amp-coulomb
amp-volt
The greatest equivalent resistance occurs when resistances are connected in which type of arrangement?
series
parallel
series-parallel
None of the above
When two bar magnets are near each other, the north pole of one of the magnets experiences what type of force from the other magnet?
an attractive force
a repulsive force
a Coulomb force
both (a) and (b)
What is the variation in the location of the Earth's magnetic north pole from true north given by?
the law of poles
the magnetic field
magnetic domains
the magnetic declination
What type of energy conversion does a motor perform?
chemical energy into mechanical energy
mechanical energy into electrical energy
electrical energy into mechanical energy
mechanical energy into chemical energy
Which of the following is true of a step-up transformer?
It has an equal number of windings on the primary and secondary coils.
It has fewer windings on the secondary coil.
It has fewer windings on the primary coil.
None of the preceding statements is true.
In refraction, which of the following wave properties is unchanged?
frequency
wavelength
speed
both a and b
Which is true of a convex mirror?
It has a radius of curvature equal to f.
It is a converging mirror.
It forms only virtual images.
It forms magnified and reduced images
Which is true for a real image?
It is always magnified.
It is formed by converging light rays.
It is formed behind a mirror.
It occurs only for Di > Do.
Which of the following is true of a concave lens?
It is a converging lens.
It is thicker at the center than at the edge.
It is a lens that forms virtual images for Do > f.
It is a lens that forms real images for Do > f.
Which is true of diffraction?
It occurs best when the slit width is less than the wavelength of a wave.
It depends on refraction.
It is caused by interference.
It does not occur for light.
When does total constructive interference occur?
when waves are in phase
at the same time as total destructive interference
when the waves are equal in amplitude and are completely out of phase
when total internal reflection occurs
A wave with particle oscillation parallel to the direction of propagation is a(n)
transverse wave
longitudinal wave
light wave
none of the preceding
The energy of a wave is related to the square of which of the following?
amplitude
frequency
wavelength
period
How fast do electromagnetic waves travel in vacuum?
3.00 x 10^8 m/s
9.8 m/s^2
344 m/s
3.44 x 10^6 m/s
Which one of the following regions has frequencies just slightly less than the visible region in the electromagnetic frequency spectrum?
radio wave
ultraviolet
microwave
infrared
Which of the following sound frequencies would not be heard by the human ear?
25 Hz
900 Hz
20 kHz
25 kHz
A sound with an intensity level of 30 dB is how many times louder than the threshold of hearing?
10
3000
100
1000
A moving observer approaches a stationary sound source. What does the observer hear?
an increase in frequency
a decrease in frequency
the same frequency as the source
nothing
If an astronomical light source were moving toward us, then what would be observed
a blueshift
a shift toward longer wavelengths
a shift toward lower frequencies
a sonic boom
Temperature is
a measure of heat
a relative measure of hotness and coldness
internal energy in transit
both (b) and (c)
Which of the following is the largest unit of heat energy?
kilocalorie
calorie
joule
Btu
Which of the following methods of heat transfer generally involves mass movement?
conduction
convection
Radiation
none of the above
The direction of a natural process is indicated by which of the following?
conservation of energy
change in entropy
thermal efficiency
specific heat
An idealized material that absorbs and perfectly emits electromagnetic radiation is a (an)
star.
blackbody.
electromagnetic wave.
photon
The image you see in a mirror is
a real image.
a virtual image.
not really an image.
mirror image
The ratio of the speed of light in a vacuum to the speed of light in a transparent material is called the
index of deflection.
index of reflection.
index of refraction.
index of diffusion.
The component colors of sunlight were first studied by
Joule.
Galileo.
Newton.
Watt
We see a blue sky because
air molecules absorb blue light.
air molecules reflect red light.
scattering of light by air molecules and dust is more efficient when its wavelength is longer.
scattering of light by air molecules and dust is more efficient when its wavelength is shorter.
The general theory of relativity explains
gravity as a change of space and time.
why the speed of light changes with the speed of an observer.
how the laws of physics change with changes of motion.
Newton's laws of motion.
The current in the secondary coil of a transformer is produced by a
varying magnetic field.
varying electric field.
constant magnetic field.
constant electric field
A step-up transformer steps up the
voltage.
current.
power.
energy.
The law that predicts the behavior of electrostatic forces acting through space is
the law of universal gravitation.
Watt's law.
Coulomb's law.
Ohm's law
Resonance occurs when an external force matches the
interference frequency.
decibel frequency.
beat frequency.
natural frequency
What is changed by destructive interference of a sound wave
Frequency
Phase
Amplitude
Wavelength
