Phy101 Physics Online Solved Quizzes/MCQ's File No 2



The number of significant figures in 0.00150 is:

► 5
► 4
► 3
► 2


One revolution is the same as:

► 1 rad
► 57 rad
► π/2 rad
► π rad
► 2π rad


For a body to be in equilibrium under the combined action of several forces:

► All the forces must be applied at the same point
all the forces must be applied at the same point
► all of the forces form pairs of equal and opposite forces
► any two of these forces must be balanced by a third force
► the sum of the torques about any point must equal zero


A bucket of water is pushed from left to right with increasing speed across a
horizontal surface.
Consider the pressure at two points at the same level in the water.

► It is the same
► It is higher at the point on the left
► It is higher at the point on the right
► At first it is higher at the point on the left but as the bucket speeds up it
is lower there



An organ pipe with both ends open is 0.85m long. Assuming that the speed of sound is 340m/s, the frequency of the third harmonic of this pipe is:
► A. 200 Hz
► B. 300 Hz
► C. 400 Hz
► D. 600 Hz


Capacitors C1 and C2 are connected in series. The equivalent capacitance is
given by

► C1C2/(C1 + C2)
► (C1 + C2)/C1C2
► 1/(C1 + C2)
► C1/C2


If the potential difference across a resistor is doubled:

► only the current is doubled
► only the current is halved
► only the resistance is doubled
► only the resistance is halved


By using only two resistors, R1 and R2, a student is able to obtain resistances of 3Ω, 4Ω, 12Ω, and 16 Ω. The values of R1 and R2 (in ohms) are:

► 3, 4
► 2, 12
► 3, 16
► 4, 12



Faraday's law states that an induced emf is proportional to:

► the rate of change of the electric field
► the rate of change of the magnetic flux
► the rate of change of the electric flux
► the rate of change of the magnetic field


A generator supplies 100V to the primary coil of a transformer. The primary has 50 turns and the secondary has 500 turns. The secondary voltage is:

► 1000V
► 500V
► 250V
► 100V


The wavelength of red light is 700 nm. Its frequency is ____________________.

► 4.30 * 104 Hertz
► 4.30 * 103 Hertz
► 4.30 * 105 Hertz
► 4.30 * 102 Hertz
A laser in a compact disc player generates light that has a wavelength of 780 nm in air. The light then enters into the plastic of a CD. If the index of refraction of plastic is 1.55, the speed of this light once enter the plastic is ________.

► 3.00 * 108 m/s
► 1.94 * 108 m/s
► 4.29 * 108 km/h
► 3.00 * 108 km/h



PHY101 - Physics - Question No: 14 ( M - 1 )
Which of the following electromagnetic radiations has photons with the
greatest energy?

► blue light
► yellow light
► x rays
► radio waves

PHY101 - Physics - Question No: 15 ( M - 1 )
A virtual image is one:
► toward which light rays converge but do not pass through
► from which light rays diverge as they pass through
► toward which light rays converge and pass through
► from which light rays diverge but do not pass through

PHY101 - Physics - Question No: 16 ( M - 1 )
What is the unit of magnification factor?

► meter.Kelvin
► radian.Kelvin
► degree.Kelvin
► no units

PHY101 - Physics - Question No: 17 ( M - 1 )
During an adiabatic process an object does 100 J of work and its temperature
decreases by 5K. During another process it does 25 J of work and its
temperature decreases by 5 K. Its heat capacity for the second process is.

► 20 J/K
► 100 J/K
► 15 J/K
► 5 J/K


We desire to make an LC circuit that oscillates at 100 Hz using an inductance of
2.5H. We also need a capacitance of:
► 1 F
► 1mF
► 1 μF
► 100 μF

PHY101 - Physics - Question No: 9 ( M - 1 ) 
The wavelength of red light is 700 nm. Its frequency is ____________________.
► 4.30 * 10Hertz
► 4.30 * 10Hertz
► 4.30 * 10Hertz
► 4.30 * 10Hertz

PHY101 - Physics - Question No: 10 ( M - 1 )
Which of the following statements is NOT TRUE about electromagnetic
waves?
► Electromagnetic waves satisfy the Maswell's Equation.
► Electromagnetic waves can not travel through space.
► The receptions of electromagnetic waves require an antenna.
► The electromagnetic radiation from a burning candle is
unpolarized.

PHY101 - Physics - Question No: 11 ( M - 1 )
Radio waves and light waves are ____________________________.
► Longitudinal waves
► Transverse waves
► Electromagnetic and transverse both

► Electromagnetic and longitudinal both



PHY101 - Physics - Question No: 18 ( M - 1 )
An ideal gas expands into a vacuum in a rigid vessel. As a result there is:

► a change in entropy
► a decrease of internal energy
► an increase of pressure
► a change in temperature

PHY101 - Physics - Question No: 19 ( M - 1 )
The Stern-Gerlach experiment makes use of:

► a strong uniform magnetic field
► a strong non-uniform magnetic field
► a strong uniform electric field
► a strong non-uniform electric field




As a 2.0-kg block travels around a 0.50-m radius circle it has an angular speed of 12 rad/s. The circle is parallel to the xy plane and is centered on the z axis, a
distance of 0.75m from the origin. The z component of the angular momentum
around the origin is:

► 6.0kg · m2/s
► 9.0kg · m2/s
► 11 kg · m2/s
► 14 kg · m2/s


net torque applied to a rigid object always tends to produce:

► linear acceleration
► rotational equilibrium
► angular acceleration
► rotational inertia

1. Velocity is defined as:
A. rate of change of position with time
B. position divided by time
C. rate of change of acceleration with time
D. a speeding up or slowing down
E. change of position

n simple harmonic motion, the restoring force must be proportional to the:
► amplitude
► frequency
► velocity
► displacement

PHY101 - Physics - Question No: 5 ( M - 1 )
Mercury is a convenient liquid to use in a barometer because:
► it is a metal
► it has a high boiling point
► it expands little with temperature
► it has a high density

PHY101 - Physics - Question No: 6 ( M - 1 )
The units of the electric field are:
► J/m
► J/(C·m)
► J/C
► J·C

2. Acceleration is defined as:
A. rate of change of position with time
B. speed divided by time
C. rate of change of velocity with time
D. a speeding up or slowing down
E. change of velocity

3. Which of the following is a scalar quantity?
A. Speed
B. Velocity
C. Displacement
D. Acceleration
E. None of these



An object attached to one end of a spring makes 20 vibrations in 10 s. Its angular frequency is:

► 1.57 rad/s
► 2.0 rad/s
► 6.3 rad/s


In simple harmonic motion, the restoring force must be proportional to the:

► amplitude
► frequency
► velocity
► displacement


Mercury is a convenient liquid to use in a barometer because:

► it is a metal
► it has a high boiling point
► it expands little with temperature
► it has a high density


The units of the electric field are:

► J/m
► J/(C·m)
► J/C


► J·C
Faraday's law states that an induced emf is proportional to:
► the rate of change of the electric field
► the rate of change of the magnetic flux
► the rate of change of the electric flux
► the rate of change of the magnetic field

PHY101 - Physics - Question No: 10 ( M - 1 )
generator supplies 100V to the primary coil of a transformer. The primary has
50 turns and the secondary has 500 turns. The secondary voltage is:
► 1000V
► 500V
► 250V
► 100V

PHY101 - Physics - Question No: 11 (M - 1)
The wavelength of red light is 700 nm. Its frequency is ____________________.
► 4.30 * 10Hertz
► 4.30 * 10Hertz
► 4.30 * 10Hertz

► 4.30 * 10Hertz

A farad is the same as a

► J/V
► V/J
► C/V
► V/C


We desire to make an LC circuit that oscillates at 100 Hz using an inductance of 2.5H. We also need a capacitance of:

► 1 F
► 1mF
► 1 μF
► 100 μF


The wavelength of red light is 700 nm. Its frequency is ____________________.

► 4.30 * 104 Hertz
► 4.30 * 103 Hertz
► 4.30 * 10Hertz
► 4.30 * 102 Hertz

An ideal gas expands into a vacuum in a rigid vessel. As a result there is:
► a change in entropy
► a decrease of internal energy
► an increase of pressure
► a change in temperature

PHY101 - Physics - Question No: 19 ( M - 1 )
The Stern-Gerlach experiment makes use of:
► a strong uniform magnetic field
► a strong non-uniform magnetic field
► a strong uniform electric field

► a strong non-uniform electric field

Which of the following statements is NOT TRUE about electromagnetic
waves?

► Electromagnetic waves satisfy the Maswell's Equation.
► Electromagnetic waves can not travel through space.
► The receptions of electromagnetic waves require an antenna.
► The electromagnetic radiation from a burning candle is
unpolarized.


Radio waves and light waves are ____________________________.

► Longitudinal waves
► Transverse waves
► Electromagnetic and transverse both
► Electromagnetic and longitudinal both


Wien's Law states that, lmax = ________ K.

► 2.90 * 10-3 Hertz
► 2.90 * 10-3 s
► 2.90 * 10-3 kg
► 2.90 * 10-3 m


Interference of light is evidence that:

► the speed of light is very large
► light is a transverse wave
► light is a wave phenomenon
► light is electromagnetic in character


Fahrenheit and Kelvin scales agree numerically at a reading of:

► -40
► 0
► 273
► 574




According to the theory of relativity:

► moving clocks run fast
► energy is not conserved in high speed collisions
► the speed of light must be measured relative to the ether
► none of the above are true


Light from a stationary spaceship is observed, and then the spaceship moves
directly away from the observer at high speed while still emitting the light. As
a result, the light seen by the observer has:

► higher frequency and a longer wavelength than before
► lower frequency and a shorter wavelength than before
► higher frequency and a shorter wavelength than before
► lower frequency and a longer wavelength than before


How fast should you move away from a 6.0 × 1014 Hz light source to observe
waves with a frequency of 4.0 × 1014 Hz?

► 20c
► 38c
► 45c
► 51c
The quantum number n is most closely associated with what property of the
electron in a hydrogen atom?

► Energy
► Orbital angular momentum
► Spin angular momentum
► Magnetic moment


The quantum number ms is most closely associated with what property of the
electron in an atom?

► Magnitude of the orbital angular momentum
► Energy
► z component of the spin angular momentum
► z component of the orbital angular momentum


As the wavelength of a wave in a uniform medium increases, its speed will _____.

► Decrease
► Increase
► Remain the same
► None of these






Previous Post Next Post