R4RIN – MCQs, Mock Tests | MCAT MCAT Physics Mcq Questions Circular motion Set 2

The circumference subtends an angle

1. ? radianradian
2. 2? radian
3. ?/2 radian
4. 4? radian

✅ Correct Answer: 2

The relation between linear and angular acceleration is

1. a = a x r
2. a = r x a
3. a = a x r
4. r = a x a

✅ Correct Answer: 3

When a body is whirled in a horizontal circle by means of a string the centripetal force is supplied by

1. mass of a body
2. velocity of body
3. tension in the string
4. centripetal acceleration

✅ Correct Answer: 3

Centripetal force performs

1. maximum work
2. minimum work
3. negative work
4. no work

✅ Correct Answer: 4

When a body moves in a circle of radius r with linear speed V its centripetal force is

1. mV/r2
2. mV/r
3. mV2/r
4. mV2/r2

✅ Correct Answer: 3

A stone is whirled in a vertical circle at the end of a string. When the stone is at the highest position the tension in the string is

1. maximum
2. zero
3. equal to the weight of the stone
4. less than the weight of the stone

✅ Correct Answer: 3

The span of broad jump depends upon

1. mass of the jumper
2. height of jump
3. angle of projection
4. none

✅ Correct Answer: 3

In case of planets the necessary acceleration is provided by

1. Gravitational force
2. frictional force
3. coulomb force
4. centripetal force

✅ Correct Answer: 1

If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4. Its angular speed is

1. 4 rad. S-1
2. 5 rad. S-1
3. 1.6 rad. S-1
4. 2.8 ms-1

✅ Correct Answer: 2

A body can have consutant velocity when it follows a

1. elliptical path
2. circular path
3. parabolic path
4. rectilinear path

✅ Correct Answer: 4

A body moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R the ration of displacement to the covered path will be

1. ? R
2. 2? R
3. zero
4. 4? R

✅ Correct Answer: 3

The angular speed for daily rotatio of earth in rad S-1 is

1. 2 ?
2. ?
3. 4 ?
4. 7.3 x 10-5 rads-1

✅ Correct Answer: 4

When a wheel 1 m in diameter makes 30 rev min the linear speed of point on its rim in ms-1 is

1. 2?
2. ?/2
3. ?
4. 20?

✅ Correct Answer: 2

A cyclist cycling around a circular racing track skids because

1. the centripetal force upon him is less than limiting friction
2. the centripetal force upon him is greater then limiting friction
3. the centripetal force upon him is equal to the limiting friction
4. the friction between the tyres of the cycle and road vanishes

✅ Correct Answer: 2

If a wheel of radius r turns through an angle of 30? then the distance through which any point on its rim moves is

1. ? /3 x r
2. ?/6 x r
3. ?/30 x r
4. ? / 180 x r

✅ Correct Answer: 2

In angular motion, Newtons second law of motion is

1. F=ma
2. F=?p/?t
3. ? = 1a
4. all above

✅ Correct Answer: 3

Angular speed of seconds hand of a watch in rads-1 is

1. ?
2. ?/2
3. ?/30
4. ?/180

✅ Correct Answer: 3

The shaft of a motor rotates at a constant angular speed of 360rev/min. Angle turned through in 1 sec in radian is

1. ?
2. 3?
3. 6?
4. 12?

✅ Correct Answer: 4

What is outward force acting on a mass of 10 kg when rotating at one end an inelastic string 10m long at speed of 1m/s?

1. 1N
2. 10N
3. 2N
4. 100N

✅ Correct Answer: 1

If we whirl a stone at the end of a string in the vertical circle, it is likely to break when the stone is

1. at the highest point
2. at the lowest point
3. at any point during motion
4. at the point where gravity is not acting

✅ Correct Answer: 2

Waves transmit __________________ from one place to another

1. energy
2. mass
3. both
4. none

✅ Correct Answer: 1

The waves that require a material medium for their propagation are called

1. matter waves
2. electromagnetic waves
3. carrier waves
4. mechanical waves

✅ Correct Answer: 4

The distance between any two consecutive crests or troughs is called

1. frequency
2. period
3. wave length
4. phase difference

✅ Correct Answer: 3

When two identical traveling waves are superimposed, the velocity of the resultant wave

1. decreases
2. increases
3. remains unchanged
4. becomes zero

✅ Correct Answer: 3

In vibrating cord the points where the amplitude is maximum, are called

1. antinodes
2. nodes
3. troughs
4. crests

✅ Correct Answer: 1

The distance between two consecutive nodes is

1. ?/2
2. ?/4
3. ?
4. 2?

✅ Correct Answer: 1

The distance between consecutive node and anitnode is

1. ?
2. ?/2
3. 2?
4. ?/4

✅ Correct Answer: 4

If stretching force T of wire increases, then its frequency

1. decreases
2. increases
3. remains the same
4. any of above

✅ Correct Answer: 2

A stationary wave is set up in the air column of a closed pipe. At the closes end of the pipe

1. always an node in formed
2. always an antinode is formed
3. neither node nor antinode is formed
4. sometimes a node and sometimes an antinode is formed

✅ Correct Answer: 1

It is possible to distinguish between transverse and longitudinal waves form the property of

1. refraction
2. polarization
3. interference
4. diffraction

✅ Correct Answer: 2

According to Newton sound travel in air under the conditions of

1. adiabatic
2. isothermal
3. isobaric
4. isochoric

✅ Correct Answer: 3

Sound waves do not travel in vacuum because

1. they are transverse waves
2. they are stationary waves
3. they require material medium for propagation
4. they do not have enough energy

✅ Correct Answer: 3

Velocity of sound in vacuum is

1. 332 ms-1
2. 320 ms-1
3. Zero
4. 224 ms-1

✅ Correct Answer: 3

Increase in velocity of sound in the air for 1 ?C rise in temperature is

1. 1.61 ms-1
2. 61.0 ms-1
3. 0.61 ms-1
4. 2.00 ms-1

✅ Correct Answer: 3

The velocity of sound is greatest in

1. Water
2. air
3. copper
4. ammonia

✅ Correct Answer: 3

On loading the prong of a tuning form with wax its frequency

1. increases
2. decreases
3. remains unchanged
4. may increase or decrease

✅ Correct Answer: 2

The velocity of sound in air would become double than its velocity at 0?C at temperature

1. 313?C
2. 586?C
3. 819?C
4. 1172?C

✅ Correct Answer: 3

The normal ear is the most sensitive in the frequency range

1. 20000 to 30000 hertz
2. 10 to 20 hertz
3. 2000 to 4000 hertz
4. 6000 to 8000 hertz

✅ Correct Answer: 3

Ultrasonic have

1. frequency in the audible range
2. frequency is greater than 20 kHz
3. frequency lower than 20 Hz
4. all of above

✅ Correct Answer: 2

The periodic alternation of sound between maximum and minimum loudness are called

1. silence zone
2. interference
3. beats
4. resonance

✅ Correct Answer: 3

The number of beats produced per second is equal to

1. the sum of the frequencies of two tuning forks
2. the difference of the frequencies of two tuning forks
3. the ratio of the frequencies of two tuning forks
4. the frequency of either of the two tuning forks

✅ Correct Answer: 2

Beats are the results of

1. diffraction of sound waves
2. constructive and destructive interference
3. polarization
4. destructive interference

✅ Correct Answer: 2

Silence zone takes place due to

1. constructive interference
2. destructive interference
3. beats
4. resonance

✅ Correct Answer: 2

Doppler effect applies to

1. sound wave only
2. light wave only
3. both sound and light waves
4. neither sound nor light wave

✅ Correct Answer: 3

When the source of sound moves away form a stationary listener then _________ occurs.

1. an apparent increase in frequency
2. an apparent decrease in frequency
3. an apparent decrease in wavelength
4. no apparent change in frequency

✅ Correct Answer: 2

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?

1. 1/4f
2. 1/2f
3. frequency lower than 20 Hz
4. 2f

✅ Correct Answer: 3

Which one is the correct relation for fundamental frequency of open and closed pipe?

1. fopen = 2 fclosed
2. fclosed = 2fopen
3. fopen = fclosed
4. fopen = 1 / f closed

✅ Correct Answer: 1

In open organ pipe

1. only even harmonics are present
2. only odd harmonics are present
3. both even and odd harmonics are present
4. selected harmonics are present

✅ Correct Answer: 3

Which one is the correct relation?

1. VNewton = V Laplace
2. VNewton =
3. VNewton =
4. VNewton =

✅ Correct Answer: 3

The dimension of elastic modulus ? is

1. ML-1T-2
2. ML-2T-2
3. MLT-2
4. ML2T-2

✅ Correct Answer: 1