phy101 final term preparation 2022  Phy101 Final Term short notes   phy101  notes  for  final  term 

Question No: 1 ( Marks: 1 ) - Please choose one
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 ) - Please choose one
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: 3 ( Marks: 1 ) - Please choose one
A force of 5000N is applied outwardly to each end of a 5.0-m long rod with a radius of
34.0 cm and a Young's modulus of 125 × 108 N/m2
. The elongation of the rod is:

► 0.0020mm
► 0.0040mm
► 0.14mm
► 0.55mm



Question No: 4 ( Marks: 1 ) - Please choose one
A particle oscillating in simple harmonic motion is:
► never in equilibrium because it is in motion
► never in equilibrium because there is always a force
► in equilibrium at the ends of its path because its velocity is zero there
► in equilibrium at the center of its path because the acceleration is zero there


Question No: 5 ( Marks: 1 ) - Please choose one
In simple harmonic motion, the restoring force must be proportional to the:
► amplitude
► frequency
► velocity
► displacement




Question No: 6 ( Marks: 1 ) - Please choose one
A 160-N child sits on a light swing and is pulled back and held with a horizontal force of
100 N. The magnitude of the tension force of each of the two supporting ropes is:

► 60N
► 94N
► 120N
► 190N

Question No: 7 ( Marks: 1 ) - Please choose one
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 ) - Please choose one
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 ) - Please choose one
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


Question No: 10 ( Marks: 1 ) - Please choose one
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 ) - Please choose one
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 ) - Please choose one
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 ) - Please choose one
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 ) - Please choose one
1 mi is equivalent to 1609 m so 55 mph is:
► 15 m/s
► 25 m/s
► 66 m/s
► 88 m/s

 phy101 final term preparation 2022  Phy101 Final Term short notes   phy101  notes  for  final  term 

Question No: 1 ( Marks: 1 ) - Please choose one
The number of significant figures in 0.00150 is:
► 5
► 4
► 3
► 2
Question No: 2 ( Marks: 1 ) - Please choose one
One revolution is the same as:

► 1 rad
► 57 rad
► Ï€/2 rad
► Ï€ rad
► 2Ï€ rad


Question No: 3 ( Marks: 1 ) - Please choose one
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


Question No: 1 ( Marks: 1 ) - Please choose one
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


Question No: 2 ( Marks: 1 ) - Please choose one
A net torque applied to a rigid object always tends to produce:
► rotational equilibrium
► linear acceleration
► rotational equilibrium
► angular acceleration
► rotational inertia


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


Question No: 4 ( Marks: 1 ) - Please choose one
In simple harmonic motion, the restoring force must be proportional to
the:
► displacement
► amplitude
► frequency
► velocity
► displacement


Question No: 5 ( Marks: 1 ) - Please choose one
Mercury is a convenient liquid to use in a barometer because:
► it has a high density
► 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 ) - Please choose one
The units of the electric field are:
► J/m
► J/m
► J/(C·m)
► v/m
► J·C


Question No: 7 ( Marks: 1 ) - Please choose one
A farad is the same as a
► J/V
► J/V
► V/J
► C/V
► V/C


Question No: 9 ( Marks: 1 ) - Please choose one
The wavelength of red light is 700 nm. Its frequency is
____________________.
► 4.30 * 105 Hertz
► 4.30 * 104 Hertz
► 4.30 * 103 Hertz
► 4.30 * 105 Hertz
► 4.30 * 102 Hertz


Question No: 10 ( Marks: 1 ) - Please choose one
Which of the following statements is NOT TRUE about electromagnetic
waves?
► The electromagnetic radiation from a burning candle is unpolarized.
► 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 ) - Please choose one
Radio waves and light waves are ____________________________.
► Electromagnetic and transverse both
► longitudinal waves
► Transverse waves
► Electromagnetic and transverse both
► Electromagnetic and longitudinal both


Question No: 14 ( Marks: 1 ) - Please choose one
Fahrenheit and Kelvin scales agree numerically at a reading of:
► -40
► -40
► 0
► 273
► 574

 phy101 final term preparation 2022  Phy101 Final Term short notes   phy101  notes  for  final  term 


Question No: 15 ( Marks: 1 ) - Please choose one
According to the theory of relativity:
► moving clocks run fast
► 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 ) - Please choose one
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:
► lower frequency and a shorter wavelength than before
► 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 ) - Please choose one
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?
► 38c
► 20c
► 38c
► 45c
► 51c



Question No: 18 ( Marks: 1 ) - Please choose one
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



Question No: 19 ( Marks: 1 ) - Please choose one
The quantum number ms is most closely associated with what property of
the  electron in an atom?
► Energy
► 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 ) - Please choose one
As the wavelength of a wave in a uniform medium increases, its speed will
_____.
► Remain the same
► Decrease
► Increase
► Remain the same
► None of these


Chapter 4: MOTION IN TWO AND THREE DIMENSIONS
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
ans: A


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
ans: C


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


4. Which of the following is a vector quantity?
A. Mass
B. Density
C. Speed
D. Temperature
E. None of these
ans: E

 phy101 final term preparation 2022  Phy101 Final Term short notes   phy101  notes  for  final  term 


5. Which of the following is NOT an example of accelerated motion?
A. Vertical component of projectile motion
B. Circular motion at constant speed
C. A swinging pendulum
D. Earth’s motion about sun
E. Horizontal component of projectile motion
ans: E


36 Chapter 4: MOTION IN TWO AND THREE DIMENSIONS
6. A particle goes from x = −2m, y =3m, z =1mto x =3m, y = −1m, z = 4m. Its
displacement is:
A. (1m)ˆi + (2m)ˆj + (5m) ˆk
B. (5m)ˆi −(4m)ˆj + (3m) ˆk
C. −(5m)ˆi + (4m)ˆj −(3m) ˆk
D. −(1m)ˆi −(2m)ˆj −(5m) ˆk
E. −(5m)ˆi −(2m)ˆj + (3m) ˆk
ans: B


7. A jet plane in straight horizontal flight passes over your head. When it is
directly above you, the sound seems to come from a point behind the plane in a direction 30◦
from the vertical. The speed of the plane is:
A. the same as the speed of sound
B. half the speed of sound
C. three-fifths the speed of sound
D. 0.866 times the speed of sound
E. twice the speed of sound
ans: B

 phy101 final term preparation 2022  Phy101 Final Term short notes   phy101  notes  for  final  term