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PHY101 Solved MCQs Mega File 
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8 
As the wavelength of a wave in a uniform medium increases, its
frequency will _____. 
Decrease 

9 
A bullet shot straight up returns to its starting point in 10
sec. the initial speed was: 
49 m/s 

11 
Youngâ€™s modulus is a proportionality constant that relates the
force per unit area applied perpendicularly at the surface of an object to: 
the fractional change in length 

12 
A ball is thrown upward into the air with a speed that is greater than terminal speed. It lands at the place where it was thrown.
During its flight the force of air resistance is the greatest: 
at the top of its trajectory 

13 
A sphere of the moment on inertia I roll down an inclined plane
without slipping. The ratio of the rotational kinetic energy to the
transitional kinetic energy is near: 
5/7 

14 

Reverberation 

15 
A municipal water supply is provided by a tall water tower.
Water from this tower flows to a building. How does the water flow out of a
faucet on the ground floor of a building compare with the water flow out of
an identical faucet on the second floor of the building? 
Water flows more rapidly out of the groundfloor
faucet. 

16 
An elastic collision is one in which: 
kinetic energy and momentum are both conserved 

17 
The ultimate strength of a sample is the stress at which the
sample 
Breaks/ returns to
its original shape when the stress is removed 

18 
The dot product of vector A with itself is equal to: 
A^2 

19 
A heavy particle moving with 5 m/s suffers an elastic collision
with a light particle at rest. After the collision, the velocity of light
particle will be: 
5 m/s 

20 
Youngâ€™s modulus can be correctly given in:

N/m^{2} 

21 
A net torque applied to a rigid object always tends to produce: 
angular acceleration 

23 
The velocitytime graph is parallel to the time axis the
acceleration of moving body is: 
zero 

24 
What is the angle of projection of projectile, for which its
maximum height and horizontal range are equal? 
76 

25 
A particle



26 
Â TheÂ dimensional units of the ratio of work and
power is: 
T 

27 
The magnitude of the acceleration on the planet in orbit around
the Sun is proportional to. 
the mass of the Sun 

28 
A Prosonic wave I gent from @ ship towards the bottom of the sea. N is found that the time interval between the sending and receiving of the wave is 1.6 5. What is the depth of the sea. if the velocity of sound in
the seawater is 
1120m 

29 
Water flows into Â© house at e velocity of 15 m/s through a
pipe that has 9 radii of 0.40 m. The water then flows through a smaller pipe at a velocity of 45 m/s. What is the radius of the smuttier pipe? 
0.23m 

30 
A mosquitoâ€™s buzz is often rated with a decibel rating of 40
dB. Normal conversation is often rated at 60 dB. How many times more intense is normal conversation compared to 6 mosquito's buzz? 
20 

31 
People try to keep the... over their feet. in order to feel
stable. 
centerÂ of gravity 

32 
If force is applied at the center of mass then torque is. 
Zero 

33 
As the wavelength of a wave in a uniform medium increases. its
speed will 
Decrease 

34 
For an ideal fluid flowing
through a horizontal pipe, Bernoulli's equation state that the sum of the
pressure and energy per unit volume along the pipe does which of the
following? 
Remains constant as
the pipe diameter increases 

35 
Which of the following statement
is true? 
Weight is a force,
mass is a measure of inertia 

36 
A/an Â is the basic reason to change in the motion
of an object according to Newtonâ€™s second law of motion.Â 
Net force 

37 
When spring is
compressedÂ or stretched, the potential
energy of spring 
Â Increase 

38 
The ultimate strength of a sample is the stress in which the
sample: 
Breaks 

39 
The value of k in coulombâ€™s law depends upon: 
Medium between two charges 

40 
The law of inertia was firstly formulated by 
Newton 

41 
The ratio of the circumference of a circle to its diameter is equal
to: 
Pi 

42 
A water bed that is 1.5 m wide and 2.5 m long weighs 1055 N.
assuming the entire lower surface of the bed in contact with the floor, what is
the pressure the bed exerts on the floor? 
280 pa 

43 
The center of gravity is the average location of the â€¦â€¦.. of an
object 
Weight 

44 
Acceleration in a body is always produced in the direction of 
Force 

45 
As per coulombâ€™s law, the force of attraction or repulsion
between twopoint charge directly proportional to the 
Product os the magnitude of charges 

46 
One revolution is the same as: 
2pi rad 

47 
A  vector is obtained by dividing the vector by
its magnitude: 
Unit 

48 
Take the speed of the sound to be 340m/s. A thunderclap is
heard about 3 s after the lightning is seen. The source of both light and
sound is: 
About 1000m away 

49 
The fundamental dimensions of angular momentum are : 
ML2T1 

50 
The approximate value of get an altitude above Earth equal to
one Earth diameter is: 
4.9m/s2 

51 
If the speed of sound is 340m/s a plane flyingÂ at 400rm/s
creates @ conical shock wave with anÂ apex halfangle of: 
ZeroÂ Â Â Â 

52 
If the distance between all
pairs of particulars of the body do not change by applying a force that a body is said to be 
Rigid 
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