1). A vector is a tensor of rank:
1
2
3
4
2). If [A, B] = 0, then two operators A & B are aid to be:
Anticommute
Do not commute
Commute
None of these
3). If at + div j = is called:
Laplace’s equation
equation of continuity
Tensor equation
Equation of polar coordinates
4). First law of thermodynamics special form of:
Law of conservation of energy
Law of conservation momentum
Law of conservation
None of these
5). In spherical polar coordinates, the range of variable is Ø from:
0 —-à π/2
π/2 —-à π
0 —-à π
0 —-à 2π
6). Moment of inertia is a tensor of rank:
3rd
2nd
4 th
0 th
7). The Range of projectile will be same when the angle of projection are:
20⁰ & 80⁰
30⁰ & 50⁰
25⁰ & 50⁰
20⁰ & 45⁰
8). The work done by compound pendulum in one complete oscillation is:
Zero
Equal to K.E
Equal to P.E of pendulum
Equal to total energy of pendulum
9). A man inside an artificial satellite feels weightlessness because the force of attraction due to the earth is:
Zero at the pole
Equal to the centripetal force
Balance the force of attraction due to the moon
None of these
10). The component of a vector P along y-axis is IP1/2, the angle made by the vector with horizontal is:
60⁰
45⁰
30⁰
90⁰
11). ERG stands for:
Electro Radio Graphy
Energy Radio Graphy
Electric Graphy
None of these
12). It is possible to distinguish between transvers & longitudinal waves by studying the property of:
Polarization
Interface
Diffraction
Any of them
13). Which one of the following represents a travelling wave:
A Cos (wt + Ø)
A Cos (wt-kx)
A Sin (wt + Ø
A Sin (wt + kx)
14). Which one of the following waves cannot be polarized:
X-rays
Sound waves
Radio Waves
Ultraviolet rays
15). Alternative current is converted to direct current by a:
Moter
Dynamo
Transformer
Rectifier
16). At the resonance the value of power factor in an L.C.R series circuit is:
Zero
1/2
Infinite
One
17). Two parallel wires carrying current in the opposite direction:
Repel each
Attract
Do not attract
Get rotated perpendicular to each other
18). If the distance between two charges is doubled the coulomb force will become:
Electron
Double
Half
Same
19). An electric or magnetic field cannot accelerate:
Electron
Neutron
Half
Same
20). The penetrating power of x-rays increase with:
Increase in its velocity
Decrease in its velocity
Increase in its intensity
Decrease in intensity
21). Some amount of heat given to gas under isothermal condition will result in:
Doing external work
Rise in temperature
Doing external work change in temperature
An increase in internal energy
22). Z-component of r x p:
ZPy – YPz
ZPy + YPz
XPy – YPz
XPy – YPz
23). The larges class of elementary:
Photons
Leptons
Masons
Baryons
24). The quantum number which not involved in describing the orbit of an atomic electron is:
n
m
I
s
25). The ionization energy of an atom relative to binding energy of its nucleus is:
Greater
The same
Smaller
Sometimes greater & sometimes smaller
26). Macroscopic greater & sometimes smaller assumption about (I) structure of matter (II) radiations (III) fields:
Only (I) is true
Only (II) is true
Only (III) is true
All are true
27). If two systems “A” & “B” are in thermal equilibrium with a system “C” then ………………………are equilibrium:
A & C
C & B
B & C
None
28). The following is an intensive coordinate of a thermodynamics system in equilibrium:
Volume
Pressure
Charge
Total polarization
29). The type of work which cannot be described in macroscopic thermodynamics:
Hydrostatic work
External work
Internal Work
Adiabatic work
30). In thermodynamics, work done by the system is taken as:
Positive
Negative
Zero
None
31). The SI unit of specific heat capacity is:
J/Kg-K
J/Kg
J/K
JKg/K
33). When a horse pulls a wagon, the force that causes the horse to move forward is the force:
He exerts on him
The wagon exerts on him
He exerts on the ground
The ground exerts on him
34). The minimum number of unequal forces whose vector sum can equal zero is:
1
2
3
4
35). A force 3n acts perpendicularly to a force of 4n. There resultant has magnitude of:
1n
5n
7n
12n
36). A body in equilibrium may not have:
Velocity
Acceleration
Momentum
Kinetic energy
37). In order to cause a moving body to pursue a a circular path, it is necessary to happy:
Inertial force
Gravitational force
Centrifugal force
centripetal force
38). A hole is drilled through the earth along a diameter & a stone dropped into it. When a stone is at the center of the earth it has:
Mass
Weight
Acceleration
Potential energy
39). The rotational analog of force in linear motion is:
Moment of Inertia
Angular momentum
Torque
Weight
40). The rotational analog of force in linear motion is:
Moment of Inertia
Angular momentum
Torque
Weight
41). A Sharing stress that acts on a body affects its:
Length
Width
Volume
Shape
42). In simple harmonic motion, there is always a constant ratio between the displacement of the mass and its:
Velocity
Acceleration
Period
Energy
43). Waves transmit from one place to another:
Mass
Amplitude
Wave length
Frequency
44). Of the following properties of waves, the one that is independent of the other is its:
Amplitude
Velocity
Wave length
Frequency
45). When a sound waves goes from air into water, the quantity that remains unchanged is its:
Speed
Amplitude
Frequency
Velocity
46). Two blocks of lead, one twice as heavy as the other are both at 50C. The ratio of the heat content of the heavier block to that of the lighter block :
1/2
1
2
4
47). Heart is closely related to:
Momentum
Energy
Temperature
Friction
48). Sublimation refers to:
The vaporization of solid without first becoming a liquid
The melting of a solid
The vaporization of a liquid
Condensation of a gas into a liquid
49). Under conditions corresponding to its triple point , substances:
Is in the solid state
Is in the Liquid state
Is in the gaseous state
May be in any or all of the above state
50). The ratio between the energy dissipated in same process & the heat the appears as result is called:
Triple point
Specific point
Kilocalorie
Mechanical equivalent of heat.
51). The smallest sub-division of a compound that exhibit its characteristics properties is called:
An elementary particles
an atom
A molecule
An element
52). The energy of the molecular motion appears in the form of:
Friction
Heat
Temperature
Potential energy
53). The physics underlying the operation of a refrigerator most closely resemble the physics underlying:
heat engine
The melting of ice
the freezing of water
The evaporation of water
54). The law that governs the force between electric charges bears the name of:
Newton
Bernoull
Coulomb
Ampere
55). The electron volt is a unit of:
Charge
Potential difference
Energy
Momentum
56). A certain wire has resistance “R” the resistance of another wire, identical with the first except for having twice its diameter is:
¼ R
½ R
2R
4R
57). The separation between the plates of parallel plate capacitor whose original capacitance is now:
Momentum
Energy
Temperature
Friction
58). The time required to charge a capacitor depends upon:
The magnitude of the charge
The applied potential difference
Its capacitance only
The product of its capacitance & the resistance in the circuit
59). A current is following north along a power line. The direction of the magnetic field above it, neglecting the earth’s field is:
North
East
South
West
60). When diamagnetic substance is inserted in a current carrying coil, the magnetic field:
Decreased
Unchanged
Increased
First increase then decrease
61). The time required for a charged particle to make a complete revolution in a magnetic field does not depends upon:
Its mass
Its charge
Its energy
The magnetic flux density
62). The fact that an electric field is produced in a conductor whenever magnetic lines of force move across it is referred to as :
Ampere’s Law
Ohm’s law
Farady’s law
Lenz’s law
63). Lenz’s law is a consequence of the law of conservation:
Charge
Momentum
Lines of force
Energy
64). A dynamo is often set to generate electricity. It is actually acts as a source of:
Charge
Momentum
Lines of force
Energy
65). The time required for a current to be established in a circuit depends upon:
The magnitude of the current
The applied potential difference
Its inductance only
Its inductance & its resistance
66). Which of the following is not electromagnetic in nature?
Infrared ray
Ultraviolet rays
Radar waves
Sound waves
67). Beats are the results of:
Diffraction
Constructive interference
Destructive interference
Constructive & Destructive interference
68). Longitudinal waves do not exhibit:
Refraction
Reflection
Diffraction
Polarization
69). A crucial experiment that led to the theory of relativity was performed by:
Michelson & Morley
Albert Einstein
Pavel Cerenkov
Sarmuel ether
70). An observer moves past a stationary electron on the earth’s surface. His instrument measure:
Only an electric field
Only a magnetic field
Both electric & magnetic field
Neither electric nor magnetic field
71). Relative to the original photon, the photon that emerges from a collision with an electron has:
More energy
More momentum
Higher frequency
Longer wavelength
72). Modern physical theories indicate that:
All particles exhibit wave behavior
Only moving particles waves behavior
Only charged particles wave behavior
Only uncharged particles exhibit wave behavior
73). When a beam of light is used to determine the position of an object, the greatest accuracy is obtained if the light:
is polarized
Has short wavelength
Has long wavelength
Has a low intensity
74). The total energy of an atomic electron is:
Less than zero
Zero
More than zero
All of these
75). A hydrogen atom is in its ground state when its orbital electron:
Is within nucleus
Has escape from item
Is in its lowest energy level
is stationary
76). The energy of a quantum states is primarily dependent upon the quantum number:
n
I
s
m
77). The two electrons in a helium atom: –
Occupy different shell
occupy different sub-shell
Have opposite spins
Have parallel spins
78). There are no expected lines absent from the spectra of:
Hydrogen
The Alkali metal
The inert gases
The halogens
79). A molecule whose charge distribution is not perfectly symmetrical is called:
A polar molecule
A non-polar molecule
An electrolyte
an organic molecule
80). Water is an excellent solvent because its molecules are:
Neutral
Polar
Non-Polar
Covalent
81). The electric and magnetic fields without deflection have:
Mass
Speed
Momentum
Energy
82). Relative to the sum of the masses of its constituent nucleons, the mass of a nucleus is:
Greater
The same
smaller
Sometimes greater & sometimes smallest
83). The ionization energy of an atom relative to the binding energy of its nucleus is:
Greater
The same
smaller
Sometimes greater & sometimes smaller
84). Yukawa’s theory suggest that nuclear forces arrives through the exchange of:
Electrons
Protons
Neutrons
Masons
85). The tunnel affect makes possible
Alpha decay
–ve beta decay
+ve beta decay
Gamma decay
86). A nucleus with an excess of neutrons may decay radioactively with the emission of:
An neutron
A proton
An electron
A positron
87). The first phase of a nuclear reaction involves the formation of:
An alpha particle
A compound nucleus
An isotope
A mason
88). Of the following elementary particles, the one that never decays in free space is the:
U-masons
Hyperons
Protons
Neutrons
89). Unstable elementary particles heavier than the protons are called:
Leptons
K-mesons
Strange particles
Hyperons
90). A quantity not always conserve in the decay of elementary particles is:
Electric charge
Leptons number
Baryon number
Strangeness
91). The gird is moved closer to the cathode without changing anything. The amplification factor of the value will:
Increase
Decrease
Remains unchanged
First decreases then increases
92). On making gird potential excessively negative, plate resistance (rp):
Become zero
Becomes infinite
Remains same
Nothing can be decided
93). In an amplifier maximum voltage gain is obtained when load resistance is equal to:
Zero
Infinity
Plate resistance
Unity
94). The temperature co-efficient of resistance of a semi-conductor is:
Constant
Positive
Negative
None of above
95). For rectifying action, we use:
Choke
Diode
Transformer
Condenser
96). A.C plate resistance of a diode vale at saturation is:
Zero
infinite
Depends upon plate potential
None of these
97). L.D.R becomes essential when op-amp is used as a:
Comparator
Inverter
Non-inverter
Night switch
98). Which is not the basic operation of Boolean variables:
YES operation
Not operation
AND operation
OR operation
99). A forward biased p-n junction practically offers:
Zero resistance
Very low resistance
very high resistance
None of these
100). A solid state detector basically:
A reverse biased p-n junction
A forward biased p-n junction
A p-n transistor
A n-p-n transistor
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