| 1 |
Highly conducting state of matter is
|
A. Conductors
B. Plasma
C. Semiconductors
D. Insulators
|
| 2 |
Generally, electrical resistivity of intrinsic semiconductors decreases with increasing.
|
A. Pressure
B. Volume
C. Temperature
D. Density
|
| 3 |
If the roads are not banked
|
A. A vehicle will turn over
B. A vehicle will not travel along with curve
C. Tyres and bearing are damaged
D. Roads will be spoiled
|
| 4 |
In which of the following controlled nuclear chain reaction is used to liberate energy.
|
A. Nuclear bomb
B. Atomic bomb
C. Hydrogen bomb
D. Nuclear reactor
|
| 5 |
The process where by energy is dissipated from the oscillating system is called.
|
A. Resonance
B. Damping
C. Forced oscillation
D. Free oscillation
|
| 6 |
When wind blows in the same direction in which the sound travels, the sound velocity
|
A. Decreases
B. Increases
C. Remains unchanged
D. Becomes zero
|
| 7 |
Minor losses through values, fittings, bends etc are modeled as proportional to
|
A. Velocity head
B. Static head
C. total head
D. Pressure drop
|
| 8 |
What happen to entropy in an irreversible cycle.
|
A. No gain in entropy
B. No change in entropy
C. Loss of entropy
D. A net gain of entropy
|
| 9 |
Supplementary units radian and steradian were established for
|
A. Density
B. Viscosity
C. electric intensity
D. Geometrical quantities
|
| 10 |
Woolen clothing a effective in keeping us warm because.
|
A. An trapped int he wool acts as an insulator
B. Heat loss by convection and radiation is prevented
C. Wool is bad traciator and good absorber of heat
D. Wool can retain high temperatures
|
| 11 |
At what speed the mass of a body will be doubled.
|
A. 0.67 C
B. 0.77 C
C. 0.87 C
D. 0.97 C
|
| 12 |
Force acting on a test charge between the plates of a parallel plate capacitor is F. If one of the plates is removed teh force on the same test charge will be.
|
A. Zero
B. F/2
C. F
D. 2 F
|
| 13 |
LASER beam can be used to generate three dimensional images objects in the process called.
|
A. Tomography
B. Holography
C. Autography
D. Biography
|
| 14 |
In the direction indicated by an electric field line.
|
A. The electric field strength must increases
B. The electric field strength must decreases
C. The potential must remain constant
D. The potential must decreases
|
| 15 |
If temperature of the sink is decreased the efficiency of a Carnot engine
|
A. Increases
B. Decreases
C. Remains constant
D. First increases and thend ecreases
|
| 16 |
High frequency radio wave is called
|
A. Fluctuate wave
B. Carrier wave
C. Matre wave
D. Energetic wave
|
| 17 |
Which of the following phenomenon cannot be understood by quantum theory.
|
A. Photo electric effect
B. Compton effect
C. X-Rays production
D. Interference
|
| 18 |
The central ring is bright in case of Newton's rigs produced by
|
A. Reflection
B. Wedges
C. Refraction
D. Transmission
|
| 19 |
Who identified the first series in the spectrum of hydrogen.
|
A. Lyman
B. Balmer
C. Pfund
D. Brackett
|
| 20 |
The main causes of power losses in a generator are.
|
A. Pulsatng current
B. Eddy current
C. Magnetic current
D. Both B and C
|
| 21 |
A Galilean telescope with objective of coal length 30 cm and eyepiece of focal length.8 cm when focused for infinity has length equal to
|
A. 7.5 cm
B. 2.2 cm
C. 38 cm
D. 240 cm
|
| 22 |
A straight copper wire a moved in a uniform magnetic field such that it cuts the magnetic lines of force then.
|
A. emf will not be induced
B. emf will beinduced
C. sometimes emf will be induced and sometimes not
D. The number of turns iin the coil increases
|
| 23 |
A fixed point inside the lens through which a ray of light does not change its path is called.
|
A. Pole
B. Focus
C. Centre of curvature
D. Opticla centre
|
| 24 |
In half wave rectifier the rms value of A.C. component of the wave is.
|
A. More than A.C. Value
B. Less than D.C. value
C. Same as that of D.C.
D. Not detectable
|
| 25 |
The negative of the potential gradient is
|
A. Potential energy
B. Electrostatic force
C. Electric field intensity
D. Electromotive force
|
| 26 |
Who developed the world's first vacuum pump in 1650.
|
A. Otto vori Guricke
B. Lord Kelvin
C. Saadi Carnot
D. James maxwell
|
| 27 |
Work has the same dimensions as that of
|
A. Power
B. Liner momentum
C. Angular momentum
D. Torque
|
| 28 |
In a resistor, when base width decreases with increasing Vbc, this phenomenon is called.
|
A. Tunneling
B. Thermal runway
C. Pinch off
D. Early effect
|
| 29 |
How eddy current losses are reduced in A F and R F transformers.
|
A. By using air cores
B. By using shell cores
C. By using laminated cores
D. By using ferrite cores
|
| 30 |
The wave nature of light was proposed by
|
A. Thomas Young
B. Fresnel
C. Maxwell
D. Huygen
|