Que- Venturi meter is used to measure
a. fluid pressure
b. fluid density
c. fluid speed
d. none
Answer- fluid speed
Que- In cricket when a bowler produce reverse swing the ball will move towards
a. shinning side of the ball
b. rough side
c. seam of the ball
d. goes straight
Answer- shinning side of the ball
Que- Stokes law is applicable if body has ________shape
a. rough
b. square
c. circular
d. spherical
Answer- spherical
Que- One torr is equal to
a. 1.333 Nm-2
b. .1333 Nm-2
c. 13.33 Nm-2
d. 133.3 Nm2
Answer- 133.3 Nm2
Que- Systolic pressure is called
a. low blood pressure
b. high blood pressure
c. normal blood pressure
d. abnormal blood pressure
Answer- high blood pressure
Que- Instrument used to measure blood pressure is called
a. venturimeter
b. blood pressure
c. sphgmomanometer
d. sonometer
Answer- sphgmomanometer
Que- A chimney works works best if air exposed to the chimmey is
a. stationary
b. moving
c. moving slowly
d. moving fast
Answer- moving fast
Que- The effect of the decrease in pressure with the increase of the speed of fluid in a horizontal pipe is known as
a. Bernoullirt effect
b. Torricelli effect
c. Venturi effect
d. Stokes effect
Answer- Venturi effect
Que- Ideal fluid is
a. non-viscous
b. incompressible
c. steady flow
d. possess all properties
Answer- possess all properties
Que- Laminar flow usually occurs at speeds.
a. low
b. high
c. very high
d. some time high and some time low
Answer- low
Que- For _________ flow the path of the fluid particles cannot be tracked.
a. laminar
b. stream line
c. turbulent
d. both (a) and (b)
Answer- turbulent
Que- Sphygmomanometers measures blood pressure.
a. statically
b. dynamically
c. some time static and some time dynamic
d. none of these
Answer- dynamically
Que- Carburetor of a car is a application of
a. Venturi meter
b. Bernoulli equation
c. Both (a) and (b)
d. None
Answer- Both (a) and (b)
Que- The blood flow is ____________ flow at disystolic pressure
a. laminar
b. turbulent
c. mixed
d. none
Answer- laminar
Que- The profile of aeroplane wing which lifts it up is called as
a. wing shape
b. aerofoil profile
c. curved profile
d. none of these
Answer- aerofoil profile
Que- Bernoullis equation is applicable for
a. laminar flow
b. turbulent flow
c. both laminar and turbulent flow
d. none of these
Answer- both laminar and turbulent flow
Que- The density of human blood is nearly equal to
a. water
b. honey
c. mercury
d. oil (kerosene)
Answer- water
Que- The speed of the fluid is maximum in the venturimeter at
a. convergent duct
b. divergent duct
c. throat
d. none of these
Answer- throat
Que- The normal blood pressure range for an human body is
a. 120 to 80 torr
b. 100 to 80 torr
c. 120 to 60 torr
d. 60 to 140 torr
Answer- 60 to 140 torr
Que- In vibratory motion
a. P.E. remains constant
b. K.E. remain constant
c. total energy remain constant
d. total momentum remain constant
Answer- total energy remain constant
Que- The waveform of S.H.M. is
a. standing wave
b. sine wave
c. square wave
d. none
Answer- sine wave
Que- S.I unit of frequency is
a. vibration S-2
b. radian
c. hertz
d. ms-1
Answer- hertz
Que- In S.H.M. the velocity of a particle is maximum at
a. mean position
b. extreme position
c. middle between mean and extreme position on the right side
d. middle between mean and extreme position on the left side
Answer- mean position
Que- The acceleration of a projection on the diameter for a particle moving along a circle is
a. w2x
b. wx2
c. w2x
d. wx2
Answer- w2x
Que- Total energy of a body executing S.H.M is directly proportional to
a. square root of amplitude
b. the amplitude
c. reciprocal of amplitude
d. square of amplitude
Answer- square of amplitude
Que- The time period of a second pendulum is
a. 4 seconds
b. 3 seconds
c. 2 seconds
d. 6 seconds
Answer- 2 seconds
Que- The length of second pendulum is
a. 100 cm
b. 99 cm
c. 99.2 cm
d. 98 cm
Answer- 99.2 cm
Que- If length of second pendulum becomes four times, then its time period will become
a. four times
b. six times
c. eight times
d. two times
Answer- two times
Que- The frequency of the second pendulum is
a. 1 hertz
b. 0.5 hertz
c. 1.5 hertz
d. 2.5 hertz
Answer- 0.5 hertz
Que- Simple harmonic motion is a type of
a. rotational motion
b. circular motion
c. musical arrangement
d. vibratory motion
Answer- vibratory motion
Que- The SI unit of force constant is identical with that of
a. force
b. pressure
c. surface tension
d. loudness
Answer- surface tension
Que- When the amplitude of a wave become double its energy become
a. double
b. four times
c. one half
d. none time
Answer- four times
Que- A simple pendulum suspended form the ceiling of a lift has time period T when the lift is at rest. When the lift falls freely, the time period is
a. infinite
b. T/g
c. zero
d. g/T
Answer- infinite
Que- The energy of SHM is maximum at
a. mean position
b. extreme position
c. in between mean and extreme
d. all positions during SHM
Answer- all positions during SHM
Que- The product of frequency and time period is equal to
a. 1
b. 2
c. 3
d. 4
Answer- 1
Que- Sharpness of resonance is
a. directly proportional to damping force
b. inversely proportional to damping force
c. equal to square of damping force
d. equal to square of damping force
Answer- inversely proportional to damping force
Que- Which one dows not work according to resonance?
a. T.V
b. radio
c. microwave oven
d. bulb
Answer- bulb
Que- Phase of SHM describes
a. displacement only
b. direction of motion only
c. both displacement and direction of motion
d. neither displacement nor direction of motion
Answer- both displacement and direction of motion
Que- Natural frequency of simple pendulum depends upon
a. its mass
b. its length
c. square of its length
d. square root of its length
Answer- square root of its length
Que- Electrical resonance is observed in
a. radio
b. microwave oven
c. both in radio and microwave oven
d. neither in radio nor in microwave oven
Answer- radio
Que- Total distance traveled by bob of simple pendulum in one vibration is equal to
a. amplitude
b. square of amplitude
c. 2 x amplitude
d. 4 x amplitude
Answer- 4 x amplitude
Que- When K.E energy of SHM is maximum its
a. P.E is zero
b. acceleration is zero
c. restoring force is zero
d. all P.E acceleration and restoring force are zero
Answer- all P.E acceleration and restoring force are zero
Que- In damped harmonic oscillation which one decreases?
a. amplitude of vibration
b. energy of vibration
c. both amplitude and energy
d. neither amplitude nor energy
Answer- both amplitude and energy
Que- Forced vibration are known as
a. simple harmonic vibration
b. natural vibration
c. driven harmonic vibration
d. free vibration
Answer- driven harmonic vibration
Que- Mass attached to a spring executes.
a. vibratory motion
b. rotatory motion
c. S.H.M
d. both (a) and (c)
Answer- both (a) and (c)
Que- At Murree Hills (Assume value of g changes). If we use a simple pendulum as time standard then one second duration will.
a. increase
b. decrease
c. remains same
d. is zero
Answer- increase
Que- The velocity of the mass attached to a spring is maximum at
a. mean position
b. extreme position
c. both (a) and (b)
d. none
Answer- mean position
Que- The projection of the particle moving in a circle with non-uniform speed executes.
a. S.H.M
b. Vibratory motion
c. Both (b) and (d)
d. None S.H.M
Answer- Both (b) and (d)
Que- Displacement of the body in S.H.M is equal to amplitude when body is at
a. mean position
b. else where
c. extreme position
d. none
Answer- extreme position
Que- For a simple pendulum the restoring force is caused by
a. gravity
b. spring
c. hand
d. all of these
Answer- gravity
Que- The distance covered by a body in one complete vibration is 20cm. What is the amplitude of body
a. 10 cm
b. 5 cm
c. 15 cm
d. 7.5 cm
Answer- 5 cm
Que- A cup of milk is placed in a microwave oven. Tell which statements is false (1) Milk will be heated up only (2) Cup will remain cool (3) Both cup and mild will get hot.
a. both
b. 1
c. 2
d. 3
Answer- 3
Que- In case of a simple pendulum the cause of damping is
a. drag force of air
b. gravity
c. tension in string
d. none of these
Answer- drag force of air
Que- The energy absorbed by a body is ________________ at resonance.
a. maximum as well minimum
b. minimum only
c. maximum only
d. zero
Answer- maximum only
Que- Waves transmit __________________ from one place to another
a. energy
b. mass
c. both
d. none
Answer- energy
Que- The waves that require a material medium for their propagation are called
a. matter waves
b. electromagnetic waves
c. carrier waves
d. mechanical waves
Answer- mechanical waves
Que- The distance between any two consecutive crests or troughs is called
a. frequency
b. period
c. wave length
d. phase difference
Answer- wave length
Que- When two identical traveling waves are superimposed, the velocity of the resultant wave
a. decreases
b. increases
c. remains unchanged
d. becomes zero
Answer- remains unchanged
Que- In vibrating cord the points where the amplitude is maximum, are called
a. antinodes
b. nodes
c. troughs
d. crests
Answer- antinodes
Que- If stretching force T of wire increases, then its frequency
a. decreases
b. increases
c. remains the same
d. any of above
Answer- increases
Que- A stationary wave is set up in the air column of a closed pipe. At the closes end of the pipe
a. always an node in formed
b. always an antinode is formed
c. neither node nor antinode is formed
d. sometimes a node and sometimes an antinode is formed
Answer- always an node in formed
Que- It is possible to distinguish between transverse and longitudinal waves form the property of
a. refraction
b. polarization
c. interference
d. diffraction
Answer- polarization
Que- According to Newton sound travel in air under the conditions of
a. adiabatic
b. isothermal
c. isobaric
d. isochoric
Answer- isobaric
Que- Sound waves do not travel in vacuum because
a. they are transverse waves
b. they are stationary waves
c. they require material medium for propagation
d. they do not have enough energy
Answer- they require material medium for propagation
Que- Velocity of sound in vacuum is
a. 332 ms-1
b. 320 ms-1
c. Zero
d. 224 ms-1
Answer- Zero
Que- Increase in velocity of sound in the air for 1 ?C rise in temperature is
a. 1.61 ms-1
b. 61.0 ms-1
c. 0.61 ms-1
d. 2.00 ms-1
Answer- 0.61 ms-1
Que- The velocity of sound is greatest in
a. Water
b. air
c. copper
d. ammonia
Answer- copper
Que- On loading the prong of a tuning form with wax its frequency
a. increases
b. decreases
c. remains unchanged
d. may increase or decrease
Answer- decreases
Que- The normal ear is the most sensitive in the frequency range
a. 20000 to 30000 hertz
b. 10 to 20 hertz
c. 2000 to 4000 hertz
d. 6000 to 8000 hertz
Answer- 2000 to 4000 hertz
Que- Ultrasonic have
a. frequency in the audible range
b. frequency is greater than 20 kHz
c. frequency lower than 20 Hz
d. all of above
Answer- frequency is greater than 20 kHz
Que- The periodic alternation of sound between maximum and minimum loudness are called
a. silence zone
b. interference
c. beats
d. resonance
Answer- beats
Que- The number of beats produced per second is equal to
a. the sum of the frequencies of two tuning forks
b. the difference of the frequencies of two tuning forks
c. the ratio of the frequencies of two tuning forks
d. the frequency of either of the two tuning forks
Answer- the difference of the frequencies of two tuning forks
Que- Beats are the results of
a. diffraction of sound waves
b. constructive and destructive interference
c. polarization
d. destructive interference
Answer- constructive and destructive interference
Que- Silence zone takes place due to
a. constructive interference
b. destructive interference
c. beats
d. resonance
Answer- destructive interference
Que- Doppler effect applies to
a. sound wave only
b. light wave only
c. both sound and light waves
d. neither sound nor light wave
Answer- both sound and light waves
Que- When the source of sound moves away form a stationary listener then _________ occurs.
a. an apparent increase in frequency
b. an apparent decrease in frequency
c. an apparent decrease in wavelength
d. no apparent change in frequency
Answer- an apparent decrease in frequency
Que- A simple pendulum has a bob of mass m and its frequency is f. If we replaced the bob with a heavier one say of 2m then that will be its new frequency?
a. 1/4f
b. 1/2f
c. frequency lower than 20 Hz
d. 2f
Answer- frequency lower than 20 Hz
Que- Which one is the correct relation for fundamental frequency of open and closed pipe?
a. fopen = 2 fclosed
b. fclosed = 2fopen
c. fopen = fclosed
d. fopen = 1 / f closed
Answer- fopen = 2 fclosed
Que- In open organ pipe
a. only even harmonics are present
b. only odd harmonics are present
c. both even and odd harmonics are present
d. selected harmonics are present
Answer- both even and odd harmonics are present
Que- Waves produced at the surface of water by a pencil executing vibrating motion if held vertically at a frequency of 50Hz are
a. Longitudinal
b. Transverse
c. Periodic
d. both (a) and (c)
Answer- both (a) and (c)
Que- Newton estimated the speed of sound
a. 281m/sec
b. 333m/sec
c. 340m/sec
d. all of the above
Answer- 281m/sec
Que- Laplace found that the alternate compressions and rarefactions produced in sound waves follows
a. isothermal law
b. adiabatic law
c. isochoric law
d. all of the above
Answer- adiabatic law
Que- The speed of sound in hydrogen is __________ time than that in oxygen
a. Two times
b. Three times
c. Four time
d. Six time
Answer- Four time
Que- The beats frequency (sensible) for a human car is
a. 42Hz
b. 7 Hz
c. 256Hz
d. 262Hz
Answer- 7 Hz
Que- The speed of stationary waves in a stretched string are independent of
a. Number of loops
b. Tension in the string
c. Point where string is plucked
d. both (a) and (c)
Answer- both (a) and (c)
Que- Fundamental frequency of stationary waves in open pipe is ________ times the frequency in closed pipe.
a. One
b. Two
c. Four time
d. None of these
Answer- Two
Que- Which phenomena can be applied to estimate the velocity of star with respect to earth
a. Dopplers effect
b. Interference of waves
c. Beats phenomena
d. All of these
Answer- Dopplers effect
Que- Optical active crystals rotates the
a. vibrating plane
b. polarization plane
c. diffraction plane
d. interference plane
Answer- polarization plane
Que- Which is not optically active?
a. sugar
b. tartaric acid
c. water
d. sodium chlorate
Answer- water
Que- In double slit experiment we observe
a. interference fringes only
b. diffraction fringes only
c. both interference and diffraction fringes
d. polirized frringes
Answer- both interference and diffraction fringes
Que- When light incident normally on thin film the path difference depends upon
a. thickness of the film only
b. nature of the film only
c. angle of indidence only
d. all thickness nature and angle of incidence
Answer- all thickness nature and angle of incidence
Que- Which one of the following properties of light does not change with the nature of the medium?
a. velocity
b. wavelength
c. amplitude
d. frequency
Answer- frequency
Que- Light reaches the earth form sun in nearly
a. 15 minutes
b. 10 minutes
c. 8 minutes
d. 8 minutes 30 seconds
Answer- 8 minutes 30 seconds
Que- Photoelectric effect was given by
a. Hertz
b. Fresnel
c. Einstein
d. Plank
Answer- Einstein
Que- According to Einstein light travels form one place to another in the form of
a. waves
b. particles
c. photons
d. it was not his discovery
Answer- photons
Que- Longitudinal waves do not exhibit
a. reflection
b. refraction
c. diffraction
d. polarization
Answer- polarization
Que- Central spot of Newtons rings
a. bright
b. dark for large wavelength
c. dark
d. bright for large wavelength
Answer- bright
Que- A point source of light placed in a homogeneous medium gives rise to
a. a cylindrical wave front
b. an elliptical wave front
c. a spherical wave front
d. a plane wave front
Answer- a spherical wave front
Que- The locus of all points in a medium having the same phase of vibration is called
a. crest
b. trough
c. wavelength
d. wave front
Answer- wave front
Que- Which one of the following is nearly monochromatic light ?
a. light form fluorescent tube
b. light form neon lamp
c. light form sodium lamp
d. light form simple lamp
Answer- light form sodium lamp