Legal Metrology • Physics Paper-I
At separation between a node and anti-node, wavelength becomes
A)
A
B)
2/2
C)
A/4
D)
24
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'A/4' (Option C).
Legal Metrology • Physics Paper-I
What happens to viscosity in the case of incompressible fluids as temperature is increased
A)
It decreases
B)
It remains constant
C)
It first increase and then decrease
D)
It increases
Based on established principles in Mechanical Engineering, the correct and most clinically/technically appropriate choice is 'It first increase and then decrease' (Option C).
Legal Metrology • Physics Paper-I
Stoke’s Law is not applicable in
A)
Streamline flow
B)
Transition flow
C)
Steady flow
D)
Turbulent flow
Based on established principles in Mechanical Engineering, the correct and most clinically/technically appropriate choice is 'Streamline flow' (Option A).
Legal Metrology • Physics Paper-I
If the two input waveforms of equal amplitude and 90 degree phase difference is applied to the CRO, then the Lissajous patterns obtained will be
A)
straight line tilted at 45 degree with respect to x-axis
B)
ellipse
C)
circle
D)
vertical straight line
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'straight line tilted at 45 degree with respect to x-axis' (Option A).
Legal Metrology • Physics Paper-I
Momentum possessed by spinning objects is called
A)
linear momentum
B)
angular momentum
C)
normal momentum
D)
degrees’ momentum
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'linear momentum' (Option A).
Legal Metrology • Physics Paper-I
If the frequency of external periodic force is equal to the natural frequency of the oscillator, then the oscillator oscillates with maximum amplitude. This phenomenon is called as
A)
Free oscillations
B)
Free damped oscillations
C)
Forced oscillations
D)
Resonance
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'Free oscillations' (Option A).
Legal Metrology • Physics Paper-I
If a liquid surface is curved, then
A)
the pressure on the concave side is less than that on the convex side
B)
the pressure on the concave side is equal to that on the convex side
C)
the pressure on the concave side is more than that on the convex side
D)
the pressure on the convex side is atmospheric pressure
Based on established principles in Mechanical Engineering, the correct and most clinically/technically appropriate choice is 'the pressure on the convex side is atmospheric pressure' (Option D).
Legal Metrology • Physics Paper-I
According to Newton’s 2nd law, the object’s acceleration and centripetal force are
A)
at right angles to each other
B)
anti parallel to each other
C)
make acute angle with each other
D)
in same direction
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'make acute angle with each other' (Option C).
Legal Metrology • Physics Paper-I
The ratio of strength of a hollow shaft to that of a solid shaft subjected to torsion if both are of the same material and of the same outer diameters, the inner diameter of hollow shaft being half of the outer diameter is
A)
7/8
B)
16/15
C)
15/16
D)
8/7
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is '15/16' (Option C).
Legal Metrology • Physics Paper-I
Which of the following is a use of dimensional analysis?
A)
To check the dimensional correctness of an equation
B)
To solve the equation dimensionally.
C)
To get the number of dimensional constant
D)
To understand the dimensional equation
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'To check the dimensional correctness of an equation' (Option A).
Legal Metrology • Physics Paper-I
When the natural frequency ω₀ is equal to the forcing frequency ω, then
A)
velocity resonance takes place
B)
amplitude resonance takes place
C)
virtual resonance take place
D)
both velocity and amplitude resonance take place
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'both velocity and amplitude resonance take place' (Option D).
Legal Metrology • Physics Paper-I
The dimensions of magnetic field in M, L, T and C (Coulomb) is given as
A)
[MT⁻¹C⁻¹]
B)
[MLT⁻¹C⁻¹]
C)
[MT⁻²C⁻¹]
D)
[MT⁻²C⁻²]
Based on established principles in Electrical / Electronics Engineering, the correct and most clinically/technically appropriate choice is '[MT⁻²C⁻²]' (Option D).
Legal Metrology • Physics Paper-I
Shapes of drops of liquid are spherical because of
A)
Viscosity
B)
Conductivity
C)
Absorption
D)
Surface tension
Based on established principles in Mechanical Engineering, the correct and most clinically/technically appropriate choice is 'Absorption' (Option C).
Legal Metrology • Physics Paper-I
Two wave pulses, each of wavelength λ, are traveling toward each other along a rope. When both pulses are in the region between points X and Y, which are at a distance λ/2 apart, the shape of the rope is
A)
x-—/\y
B)
x y
C)
m y
D)
—
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is '—' (Option D).
Legal Metrology • Physics Paper-I
Reynold’s Number signifies the ratio of
A)
gravity forces to viscous forces
B)
inertia force to viscous force
C)
inertia forces to viscous forces
D)
buoyant force to inertia force
Based on established principles in Mechanical Engineering, the correct and most clinically/technically appropriate choice is 'buoyant force to inertia force' (Option D).
Legal Metrology • Physics Paper-I
Every material obeys the Hooke’s law within
A)
Elastic limit
B)
Plastic limit
C)
Inelastic limit
D)
Limit of proportionality
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'Limit of proportionality' (Option D).
Legal Metrology • Physics Paper-I
A rigid body suspend vertically and oscillates with small amplitude under the action of force of gravity is known as
A)
Simple pendulum
B)
Compound pendulum
C)
Torsional pendulum
D)
Strain pendulum
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'Simple pendulum' (Option A).
Legal Metrology • Physics Paper-I
In order to keep a body moving in a circle, there exists a force on it that is directed toward the center of the circle. This force is known as
A)
Centrifugal force
B)
Centripetal force
C)
Gravitational Force
D)
Magnetic force
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'Magnetic force' (Option D).
Legal Metrology • Physics Paper-I
Satellite around the Earth follows a circular path because
A)
gravitational force is parallel to velocity
B)
gravitational force is not parallel to velocity
C)
gravitational force is perpendicular to velocity
D)
gravitational force is not perpendicular to velocity
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'gravitational force is perpendicular to velocity' (Option C).
Legal Metrology • Physics Paper-I
When an oscillator completes 100 oscillations its amplitude reduces to 1/3 of its initial value. What will be its amplitude, when it further completes 200 oscillations?
A)
1/9
B)
1/3
C)
1/6
D)
1/27
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is '1/9' (Option A).
Legal Metrology • Physics Paper-I
In relativistic case, as the velocity of the particle approaches the speed of light, the kinetic energy approaches
A)
Infinite
B)
Rest Energy
C)
K.E. as in non-relativistic case
D)
Zero
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'K.E. as in non-relativistic case' (Option C).
Legal Metrology • Physics Paper-I
A wave of the form A sin (ωt + z) is added to a string carrying a wave of the form A sin (ωt). What is the equation of the resulting wave?
A)
0
B)
2Asin(ωt)
C)
Asin(ωt+z/2)
D)
-2Asin(ωt)
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'Asin(ωt+z/2)' (Option C).
Legal Metrology • Physics Paper-I
The time period of a compound pendulum executes angular SHM is
A)
2π√(l/g)
B)
2π√(I/mgl)
C)
2π√(g/l)
D)
2π√(mgl/I)
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is '2π√(g/l)' (Option C).
Legal Metrology • Physics Paper-I
Lissajous figures are obtained, when a particle is subjected to two S.H.M.s simultaneously
A)
along the same straight line
B)
at an angle of 3π/4 to each other
C)
at right angles to each other
D)
at an angle of π/3 to each other
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'at right angles to each other' (Option C).
Legal Metrology • Physics Paper-I
According to Special Theory of Relativity, time is not absolute quantity. It depends upon the motion of the
A)
Relativity
B)
Frame of reference
C)
Observer
D)
Light
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'Light' (Option D).
