Legal Metrology • Physics Paper-II
For a Gaussian surface S, the electric flux @ will be given as
A)
®=GAdE
B)
®=¢EdA
C)
O=0
D)
®=$EdA
In the context of Electrical / Electronics Engineering, the most appropriate and technically accurate answer is 'O=0' (Option C).
Legal Metrology • Physics Paper-II
What type of solid is quartz?
A)
Metallic
B)
Molecular
C)
Ionic
D)
Covalent
Quartz is a covalent-network solid (SiO₂).
Legal Metrology • Physics Paper-II
Q factor of a coil is measure of its
A)
retentivity
B)
mutual inductance
C)
self-inductance
D)
selectivity
Based on established principles in Electrical / Electronics Engineering, the correct and most clinically/technically appropriate choice is 'retentivity' (Option A).
Legal Metrology • Physics Paper-II
What type of current is induced in a closed loop of wire when it cuts across magnetic field lines?
A)
No current is induced
B)
Pulsating current
C)
Direct current
D)
Alternating current
Based on established principles in Electrical / Electronics Engineering, the correct and most clinically/technically appropriate choice is 'Direct current' (Option C).
Legal Metrology • Physics Paper-II
What is the energy of 1st orbit in a hydrogen atom?
A)
—2.18 x 10^−18 J
B)
—3.18 x 10^−18 J
C)
2.18 x 10^−18 J
D)
3.18 x 10^−18 J
In the context of Unmapped / long tail, the most appropriate and technically accurate answer is '3.18 x 10^−18 J' (Option D).
Legal Metrology • Physics Paper-II
Energy released in fission reaction is due to
A)
mass defect
B)
alpha radiation
C)
beta radiation
D)
gamma radiation
Fission releases energy because the products have lower total mass than the original nucleus; the mass defect becomes E=mc².
Legal Metrology • Physics Paper-II
The range of Azimuthal quantum number is
A)
0 to n
B)
0 to s
C)
0 to n-1
D)
0 to s-1
The azimuthal/orbital quantum number l runs from 0 to n−1.
Legal Metrology • Physics Paper-II
Copper has a ___ specific heat capacity as compared to glass.
A)
equal
B)
lower
C)
greater
D)
incomparable
Copper has a lower specific heat capacity (~0.385 J/g°C) compared to glass (~0.84 J/g°C).
Legal Metrology • Physics Paper-II
At very low temperatures, the specific heat at constant volume varies as
A)
T^0
B)
T
C)
T^3
D)
1/T
At very low temperatures, Cv is proportional to T^3 (Debye's T^3 law).
Legal Metrology • Physics Paper-II
The change in mass of U-235 after undergoing fission reaction is 0.002 kg. What is the amount of energy released from this mass difference?
A)
9x10^13 J
B)
1.8x10^14 J
C)
9x10^14 J
D)
1.8x10^15 J
E=mc²=0.002×(3×10⁸)²=1.8×10¹⁴ J.
Legal Metrology • Physics Paper-II
Stability of a nucleus is measured using
A)
Linear force
B)
Nuclear energy
C)
Proton energy
D)
Binding energy
Nuclear stability correlates strongly with binding energy per nucleon.
Legal Metrology • Physics Paper-II
In Newton’s ring experiment, the diameter of n-th bright ring is given by
A)
D^2 = 2(2n-1)λR
B)
D^2 = 4nλR
C)
D^2 = 2nλR
D)
D^2 = (2n+1)λR
In the context of Unmapped / long tail, the most appropriate and technically accurate answer is 'D^2 = 4nλR' (Option B).
Legal Metrology • Physics Paper-II
Wiedemann-Franz law gives the relation between
A)
electrical and thermal conductivities
B)
electrical and specific heat
C)
specific heat and thermal conductivities
D)
structure and temperature of the solid
The Wiedemann-Franz law links the thermal conductivity of a metal to its electrical conductivity.
Legal Metrology • Physics Paper-II
Miller indices of the line of intersection of (-1-11) and (110) are
A)
[110]
B)
[101]
C)
[011]
D)
[110]
The line of intersection is found by the cross product of the normal vectors of the two planes, resulting in [110].
Legal Metrology • Physics Paper-II
Atomic packing factor is the
A)
distance between two adjacent atoms
B)
volume fraction of atoms in cell
C)
projected area fraction of atoms on a plane
D)
distance between center and edge of the lattice
The Atomic Packing Factor (APF) represents the volume fraction of atoms within a unit cell.
Legal Metrology • Physics Paper-II
In Young’s double slit experiment, the fringe width @ is given by
A)
λD/d
B)
2λD/d
C)
λd/D
D)
λD/2d
In the context of Unmapped / long tail, the most appropriate and technically accurate answer is '2λD/d' (Option B).
Legal Metrology • Physics Paper-II
If the distance between the slit and screen is doubled in Young’s double slit experiment while the distance between the slits is reduced to half, then the fringe width will
A)
not change
B)
become half
C)
become doubled
D)
become four times
In the context of Unmapped / long tail, the most appropriate and technically accurate answer is 'not change' (Option A).
Legal Metrology • Physics Paper-II
According to Bohr’s atomic theory, the radii of the orbits are in the ratio
A)
1:2:3:4
B)
1:3:5:7
C)
1:4:9:16
D)
1:5:11:19
In the context of Unmapped / long tail, the most appropriate and technically accurate answer is '1:5:11:19' (Option D).
Legal Metrology • Physics Paper-II
In Newton’s ring experiment, the diameter of bright rings is proportional to
A)
odd natural numbers
B)
even natural numbers
C)
square root of odd natural numbers
D)
square root of even natural numbers
In the context of Unmapped / long tail, the most appropriate and technically accurate answer is 'odd natural numbers' (Option A).
Legal Metrology • Physics Paper-II
Point out the true statement.
A)
Field of view of Huygens’ eyepiece is equal to that of Ramsden’s eyepiece.
B)
Field of view of Huygens’ eyepiece is unequal to that of Ramsden’s eyepiece.
C)
Field of view of Huygens’ eyepiece is greater than that of Ramsden’s eyepiece.
D)
Field of view of Huygens’ eyepiece is smaller than that of Ramsden’s eyepiece.
In the context of Unmapped / long tail, the most appropriate and technically accurate answer is 'Field of view of Huygens’ eyepiece is unequal to that of Ramsden’s eyepiece.' (Option B).
Legal Metrology • Physics Paper-II
The power of Huygens’ eyepiece is
A)
negative
B)
positive
C)
zero
D)
infinity
In the context of Unmapped / long tail, the most appropriate and technically accurate answer is 'positive' (Option B).
Legal Metrology • Physics Paper-II
If a conductor carries any net charge, using Gauss’s law, the charge will
A)
reside at the center of the conductor
B)
reside on the surface of the conductor
C)
distribute equally throughout the conductor
D)
all leave the conductor
In the context of Electrical / Electronics Engineering, the most appropriate and technically accurate answer is 'reside on the surface of the conductor' (Option B).
Legal Metrology • Physics Paper-II
In Bainbridge’s Mass Spectrograph, the mass scale is
A)
parabolic
B)
curved
C)
non-linear
D)
linear
Bainbridge’s arrangement gives a linear mass scale.
Legal Metrology • Physics Paper-I
The differential equation of wave motion is given by
A)
∂²y/∂t² = v² ∂²y/∂x²
B)
∂y/∂t = v ∂y/∂x
C)
∂²y/∂t² = v ∂²y/∂x²
D)
∂y/∂t = v² ∂²y/∂x²
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is '∂²y/∂t² = v² ∂²y/∂x²' (Option A).
Legal Metrology • Physics Paper-I
Lorentz transformation equations hold for
A)
Non-Relativistic velocities only
B)
Relativistic velocities only
C)
All velocities - Non-Relativistic & Relativistic
D)
Photons only
Based on established principles in this specific field of study, the correct and most clinically/technically appropriate choice is 'Relativistic velocities only' (Option B).
