Saturday, 16 December 2017

Phy101 Midterm MCQS Mega File Solved By Mooaz

Question No: 1 ( Marks: 1 ) - Vustudentnings.blogspot.com
The SI standard of time is based on:
A. the daily rotation of the earth
B. the frequency of light emitted by Kr86
C. the yearly revolution of the earth about the sun
D. a precision pendulum clock
E. none of these

Question No: 2 ( Marks: 1 ) - Vustudentnings.blogspot.com
A net torque applied to a rigid object always tends to produce:
► rotational equilibrium
► linear acceleration
► angular acceleration
► rotational inertia

Question No: 3 ( Marks: 1 ) - Vustudentnings.blogspot.com
An object attached to one end of a spring makes 20 vibrations in 10 s. Its
angular frequency is:
► 12.6 rad/s
► 1.57 rad/s
► 2.0 rad/s
► 6.3 rad/s

Question No: 4 ( Marks: 1 ) - Vustudentnings.blogspot.com
In simple harmonic motion, the restoring force must be proportional to the:
► amplitude
► frequency
► velocity
► displacement

Question No: 5 ( Marks: 1 ) - Vustudentnings.blogspot.com
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

Question No: 6 ( Marks: 1 ) - Vustudentnings.blogspot.com
The units of the electric field are:
► J/m
► J/(C·m)
► J/C
► J·C

Question No: 7 ( Marks: 1 ) - Vustudentnings.blogspot.com
A farad is the same as a
► J/V
► V/J
► C/V
► V/C

Question No: 8 ( Marks: 1 ) - Vustudentnings.blogspot.com
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

Question No: 9 ( Marks: 1 ) - Vustudentnings.blogspot.com
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

Question No: 10 ( Marks: 1 ) - Vustudentnings.blogspot.com
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.

Question No: 11 ( Marks: 1 ) - Vustudentnings.blogspot.com
Radio waves and light waves are ____________________________.
► Longitudinal waves
► Transverse waves
► Electromagnetic and transverse both
► Electromagnetic and longitudinal both

Question No: 12 ( Marks: 1 ) - Vustudentnings.blogspot.com
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

Question No: 13 ( Marks: 1 ) - Vustudentnings.blogspot.com
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

Question No: 14 ( Marks: 1 ) - Vustudentnings.blogspot.com
Fahrenheit and Kelvin scales agree numerically at a reading of:
► -40
► 0
► 273
► 574

Question No: 15 ( Marks: 1 ) - Vustudentnings.blogspot.com
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

Question No: 16 ( Marks: 1 ) - Vustudentnings.blogspot.com
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

Question No: 17 ( Marks: 1 ) - Vustudentnings.blogspot.com
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
Question No: 18 ( Marks: 1 ) - Vustudentnings.blogspot.com
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

Question No: 19 ( Marks: 1 ) - Vustudentnings.blogspot.com
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

Question No: 20 ( Marks: 1 ) - Vustudentnings.blogspot.com
As the wavelength of a wave in a uniform medium increases, its speed will
_____.
► Decrease
► Increase
► Remain the same
► None of these

Question No: 1 ( Marks: 1 ) - Vustudentnings.blogspot.com
The lowest tone produced by a certain organ comes from a 3.0-m pipe with
both ends open. If the speed of sound is 340m/s, the frequency of this tone is
approximately:
► A. 7Hz
► B. 14 Hz
► C. 28 Hz
► D. 57 Hz

Question No: 2 ( Marks: 1 ) - Vustudentnings.blogspot.com
1. To raise the pitch of a certain piano string, the piano tuner:
► A. loosens the string
► B. tightens the string
► C. shortens the string
► D. lengthens the string

Question No: 7 ( Marks: 1 ) - Vustudentnings.blogspot.com
An object attached to one end of a spring makes 20 vibrations in 10 s. Its
angular frequency is:
► 12.6 rad/s
► 1.57 rad/s
► 2.0 rad/s
► 6.3 rad/s

Question No: 8 ( Marks: 1 ) - Vustudentnings.blogspot.com
For an object in equilibrium the net torque acting on it vanishes only if each
torque is calculated about:
► the center of mass
► the center of gravity
► the geometrical center
► the same point

Question No: 9 ( Marks: 1 ) - Vustudentnings.blogspot.com
Ten seconds after an electric fan is turned on, the fan rotates at 300 rev/min.
Its average angular acceleration is:
► 3.14 rad/s2
► 30 rad/s2
► 30 rev/s2
► 50 rev/min2
► 1800 rev/s2

Question No: 10 ( Marks: 1 ) - Vustudentnings.blogspot.com
A 4.0-N puck is traveling at 3.0m/s. It strikes a 8.0-N puck, which is
stationary. The two pucks stick together. Their common final speed is:
► 1.0m/s
► 1.5m/s
► 2.0m/s
► 2.3m/s

Question No: 11 ( Marks: 1 ) - Vustudentnings.blogspot.com
An object moving in a circle at constant speed:
► must have only one force acting on it
► is not accelerating
► is held to its path by centrifugal force
► has an acceleration of constant magnitude

Question No: 12 ( Marks: 1 ) - Vustudentnings.blogspot.com
A plane traveling north at 200m/s turns and then travels south at 200m/s.
The change in its velocity is:
► 400m/s north
► 400m/s south
► zero
► 200m/s south

Question No: 13 ( Marks: 1 ) - Vustudentnings.blogspot.com
At time t = 0 a car has a velocity of 16 m/s. It slows down with an
acceleration given by −0.50t, in m/s2 for t in seconds. It stops at t =
► 64 s
► 32 s
► 16 s
► 8.0 s

Question No: 14 ( Marks: 1 ) - Vustudentnings.blogspot.com
1 mi is equivalent to 1609 m so 55 mph is:
► 15 m/s
► 25 m/s
► 66 m/s
► 88 m/s

The number of significant figures in 0.00150 is:
► 5
► 4
► 3
► 2

Question No: 2 ( M a r k s: 1 )
One revolution is the same as:
2π rad
► 1 rad
► 57 rad
► π/2 rad
► π rad
► 2π rad
Question No: 3 (M a r k s: 1)
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

PHY101 - Physics - Question No: 4 ( M a r k s: 1 )
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

PHY101 - Physics - Question No: 5 (M a r k s: 1)
An organ pipe with both ends open is 0.85m long. Assuming that the speed
ofsound 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

Question No: 6 ( M a r k s: 1 )
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

PHY101 - Physics - Question No: 7 ( M a r k s: 1 )
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

PHY101 - Physics - Question No: 8 ( M a r k s: 1 )
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

PHY101 - Physics - Question No: 9 ( M a r k s: 1 )
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 a r k s: 1 )
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

PHY101 - Physics - Question No: 14 ( M a r k s: 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 a r k s: 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 a r k s: 1 ) vuzs
What is the unit of magnification factor?
► meter.Kelvin
► radian.Kelvin
► degree.Kelvin
► no units

Question No: 17 ( M a r k s: 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

Question No: 18 ( M a r k s: 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

Question No: 19 ( M a r k s: 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

Question No: 20 ( M a r k s: 1 )
A large collection of nuclei are undergoing alpha decay. The rate of decay at
any
instant is proportional to:
the number of undecayed nuclei present at that instant
► the time since the decays started
► the time remaining before all have decayed
► the half-life of the decay

Question No: 1 ( Marks: 1 ) - Vustudentnings.blogspot.com
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

Download Mega File Of Phy101 Midterm MCQS By Mooaz!




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