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Worksheetsp6
Total questions: 49
Worksheet time: 25mins
Which of the following statements about a fluid at rest in a cup is/are correct? |
1. Pressure is same at all the points in the fluid
2. Pressure is exerted on the walls
3. Pressure exists everywhere in the fluid.
1 and 2 only
1 only
2 only
2 and 3 only
An observer counts 4 complete water waves passing by the end of a dock every 10. seconds. What is the frequency of the waves?
40. Hz
0.40 Hz
4.0 Hz
2.5 Hz
Which among the following is the standard symbol for Archimedes number?
Ar
A
r
AR
Which of these is not a characteristic of a wave?
period
amplitude
mass
velocity
Which of the following is based on Archimedes Principle?
Galvanometer
Hydrometer
Ohmmeter
Voltmeter
A man standing in between two parallel cliffs, he produces a sound and first echo is heard from cliff-2 after 2 seconds and second echo is heard from cliff-1 after 3 seconds. If the speed of the sound in air is 340 m/s, what is the distance between two cliff?
425 m
340 m
170 m
850 m
A hydraulic system is used to lift a 2000 kg vehicle in an auto garage. If the vehicle sits on a piston of area 0.5 square meter, and a force is applied to a piston of area 0.03 square meters, what is the minimum force that must be applied to lift the vehicle?
120 N
550 N
1,176 N
1,200 N
Which phenomenon provides evidence that light has a wave nature?
absorption of light by a black sheet of paper
diffraction of light passing through a narrow opening
reflection of light from a mirror
emission of light from an energy- level transition in a hydrogen atom
What kind of waves are electromagnetic waves?
Mechanical waves
P-waves
Transverse waves
Longitudinal waves
When a transverse wave is moving through a medium, what is the action of the particles of the medium?
They Remain at rest
They vibrate in a direction perpendicular to the direction in which the wave is moving.
They vibrate in a direction parallel to the direction in which the wave is moving.
They travel through the medium with the wave.
A guitar string is plucked to set up a standing wave. How could this system be damped?
The string could be stretched, increasing the tension
The string could be clamped to reduce the vibrating length
The pressure of the surrounding air could be increased
The string could be plucked again, with a different frequency
What is fluid mechanics?
Study of fluid at rest and in motion
Study of fluid behaviour in motion
Study of fluid behaviour at rest
Study of fluid behaviour at rest and in motion
Which of the following statements is true?
If the second area is greater than the first area, then the second force exerted on the system should be greater than the first force
Pascal principle states that the pressure exerted to a confined fluid is not transmitted uniformly in all direction
Pressure exerted on the system is inversely proportional to the volume
Pressure exerted on the system is directly proportional to the volume
What factors does the pressure exerted by a liquid on the wall of a large cylindrical container depend on?
All of these
Depth of liquid
Gravity
Density of liquid
Which is a characteristic of light produced by a monochromatic light source?
It is a longitudinal wave.
Its frequency is constantly changing.
It can be dispersed by a prism
It can be polarized
Which of the following is true about the hydraulic system?
The pressure exerted on a larger piston is greater than on the small piston
No statement is true
The pressure exerted on a smaller piston is greater than on the larger piston
The pressure exerted on a small piston is equal to that on the larger piston
How will the illumination on the book change when it is moved from two feet to one foot away from the lamp?
one-half as much
four times as much
unchanged
twice as much
The statement, "The pressure in a fluid at rest is the same at all points if they are at the same height" represents which of the following?
Archimedes' principle
Boyle's Law
Pascal's Law
Bernoulli's principle
What is added together when two waves superimpose?
amplitudes
velocities
wavelength
mass
Where does Bernoulli's equation applied to?
Venturimeter
All of the above
Orifice meter
Pitot tube meter
Which of the following statements is correct?
S 1: The buoyant force acting on an object submerged in a fluid is equal to the weight of the fluid displaced by the object.
S 2: Archimedes' principle applies to objects submerged in any fluid, whether it be liquid or gas.
S1
None of the above
Both S1 and S2
S2
A capillary tube is attached horizontally to a constant heat arrangement. If the radius of the capillary tube is increased by 10%, then the rate of flow of liquid will change nearly by:
-46%
46%
10%
-10%
When the body is in equilibrium beneath the liquid then which of the following is true?
We equate all the components of the forces acting on the body equal to their resultant vector's magnitude square
We equate all the components of the forces acting on the body equal to their resultant vector's magnitude
We equate all the components of the forces acting on the body equal to their resultant vector's magnitude square root
We equate all the components of the forces acting on the body equal to zero
The reason a balloon moves up in the air is based on what principle?
Pascal Law
Archimedes' Principle
Bernoulli's Equation
None of the above
Acceleration for driven harmonic oscillator is zero at
extreme position
mean position
both A and B
none of the above
The sun is positioned
of the planet's orbit, according to Kepler's law of orbit.
in both foci
in one of the foci
in the center
along the semi-minor axis
Which of the following properties does not influence the acceleration due to gravity 'g'?
Mass of an object bound to the central body
Distance of an object from the central body
Shape of the object
Mass of the central body
What would be the duration of an year if the distance between the earth and the sun becomes one- fourth of the present distance?
One-sixth times of the present year
One-eighth times of the present year
One-tenth times of the present year
Half of the present year
An object is hung from a vertical spring and undergoes undamped simple harmonic motion. It is correct to say that there are no changes in the
elastic potential energy of the oscillating system.
gravitational potential energy of the oscillating system.
kinetic energy of the oscillating system.
total energy of the oscillating system
An oscillator vibrating at its natural frequency is
Free oscillator
Forced oscillator
both b and c
Driven harmonic oscillator
More will be the damping-- at any frequency other than resonance frequency.
less sharper the resonance and more will be amplitude
more sharper the resonance and more will be amplitude
more sharper the resonance and less will be amplitude
less sharper the resonance and less will be amplitude
A Pendulum consists of a spherical bob which is full of water is vibrating in perfect vacuum. Through a small hole water is leaking. (Ignoring reaction force of water leaving the bob) what will happen to the time period of pendulum with water leakage form completely filled bob to completely empty one
Decrease
First increase and then decrease
Remains unaffected
Increase
The acceleration due to gravity of a body is directly proportional to
the body's mass as well as the gravitational constant
the gravitational constant
it's distance from a massive Central object
the body's mass
Damping--- the time period of oscillator.
Increases
Decreases
not effect
may increase or decrease
If a planet is farther away from the sun, the time taken by that planet to orbit the sun will be:
Not so shorter
Not so longer
Shorter
Longer
According to the first law of Kepler, the shape of the orbit of the planets are
Ellipse
Perfect circle
Square
Triangle
Which of the mentioned shapes has an eccentricity of zero?
Straight line
Small ellipse
Big ellipse
Circle
What are the parameters that Kepler's law of period relates to?
Eccentricity and the time period
The semi-major axis and the time period
The semi-minor axis and the time period
The planet's area of sweep and the time period
If amplitude of vibrating body hardly depends on the frequency of applied force it means
resonance is sharp
none of the above
damping is neglible
both A and B
A satellite's period in a circular orbit near a planet is unaffected by
Planet's mass
Planet's radius
Satelitte's mass
All the mentioned
A circus performer is walking on a stretched string and string is vibrating due to his foot steps the string is an example of
free oscillator
forced oscillator
driven harmonic oscillator
both b and c
A mass is hanging vertically from a spring. The mass is set into small amplitude vertical oscillations. The total energy of the undamped oscillating system is
a minimum at the mean position of the mass
a maximum at an extreme position of the mass
the same at all positions of the mass
a maximum at the mean position of the mass
What is the name of the planet's closest approach to the sun?
Aphelion
Daphelion
Herihelion
Perihelion
Three pendulums are of same length and consists of different bobs. If frequency of applied force is double to their natural frequency. Pendulum with maximum amplitude is one which has
Same for all bobs
Wood bob
Pith bob
Iron bob
The gravitational field emanating from any material object
is always finite and independent of the presence of any external body
is zero at n infinite distance from the source object
is always infinite
exists only in the presence of any external body
If the distance between two objects is tripled, then by how many times must each body's mass be increased in order to prevent any change in the magnitude of the gravitational force between the two?
9
1.5
4.5
3
The force-distance relationship in Newton's Law of Universal Gravitation is also referred to as the
inverse - square law
inverse cube law
Inverse - exponential law
exponential - decay law
The work done by the sun's gravitational attraction on a planet as it moves from perihelion to aphelion is:
Cannot be said
0
Positive
Negative
The value of the gravitational constant does vary with
Density
Distance
Distance and Mass
Mass
