| 1 |
A application of the phenomenon of polarization is in
|
A. The scattering of light beams
B. Explaining the blue colour of sky
C. Identifying chemicals elements
D. Analysis of mechanical stress
|
| 2 |
Which of the following quantity is defined in terms of the rate of change of electric displacement field.
|
A. Conventional current
B. Electronic current
C. Displacement current
D. Pulsating current
|
| 3 |
Geiger counter was designed by
|
A. Wilson
B. Geiger and Muller
C. Lawrence
D. Mosely
|
| 4 |
A constant mass undergoes uniform acceleration the correct statement about the resultant force acting on the mass is.
|
A. It increases uniformly w.r.t time
B. It is constant but not zero
C. It is proportional to the displacement from a fixed point
D. It is proportional to the verlocity
|
| 5 |
The heat accepted and rejected by a Carnot engine operating between two heat reservoirs defines.
|
A. The efficiency of the working substance of the engine
B. the ideal gas scale of temperature
C. The ratio of the absolute temperature of the reservoirs
D. The thermal capacity of the working substance
|
| 6 |
A device which converts electrical energy into mechanical energy is called.
|
A. A.C generator
B. D.C. generator
C. Motor
D. Commutator
|
| 7 |
Amorphous solids are also called.
|
A. Crystalline solids
B. Glassy solids
C. Polymeric solids
D. Polymers
|
| 8 |
The change in entropy for any reversible cycle is identically
|
A. Infinite
B. Positive
C. Negative
D. Zero
|
| 9 |
The shape of wave front depends on
|
A. Density of medium
B. Shape of medium
C. Viscosity of medium
D. Length of medium
|
| 10 |
The half life of a radioactive substance is 6 years What is the time taken by 12 g of this substance to decay completely.
|
A. 12 years
B. 24 years
C. 48 years
D. infinity
|
| 11 |
What do we study by crystallography.
|
A. The analysis of X ray spectra of elements and study of crystal structure.
B. Visible spectra of sources and crystal study
C. Ultraviolet spectra of sources and crystal study
D. Characteristics of X-rays
|
| 12 |
Lenz's presented his law is
|
A. 1826
B. 1829
C. 1834
D. 1839
|
| 13 |
The current passing through the coil of a galvanometer is directly proportional to
|
A. Resistance
B. voltage
C. Angle of deflection
D. conductance
|
| 14 |
Wave length of a LASER can be sued as a standard of.
|
A. Angle
B. Time
C. Length
D. Temperature
|
| 15 |
X-rays eject electrons from matter by
|
A. Pair production
B. Pair annihilation
C. Compton effect
D. Photoelectric effect
|
| 16 |
Which one of the following telescopes has the least length when set for parallel rays.
|
A. Astronomical telescope
B. Galileo's telescope
C. Terrestrial telescope
D. Reflecting telescope
|
| 17 |
A pulse on the string is inverted when it is reflected from
|
A. Free end
B. Fixed end
C. Either of the two
D. Rubber cord
|
| 18 |
The central ring is bright in case of Newton's rigs produced by
|
A. Reflection
B. Wedges
C. Refraction
D. Transmission
|
| 19 |
A capacitor of capacitance F micro is fully charged from a 20 V d.c supply what is the energy delivered by 20 V supply.
|
A. 2 mJ
B. 10 m j
C. 20 mJ
D. 25 mj
|
| 20 |
The equal and opposite forces acting on a body form
|
A. Angular momentum
B. Linear momentum
C. Torque
D. Couple
|
| 21 |
Solar cells are thin sand whishes of
|
A. good conductors
B. Bad conductors
C. Semi conductor
D. Insulators
|
| 22 |
Which of the following measures how quickly the thermometer liquid mainly because it
|
A. Is coloriess
B. Is a bad conductor of heat
C. Does not expand linearly
D. Has a low boiling point
|
| 23 |
The scientific theory concerning the coming into existence of universe.
|
A. Cosmology
B. Cosmogony
C. Cosmography
D. Cosmos
|
| 24 |
The SI unit of momentum is.
|
A. kg m s-2
B. kg m2 s-2
C. kg m s-1
D. kg s-1
|
| 25 |
Liquids with disordered structure frozen in are an example of
|
A. Amorphous solids
B. Glassy solids
C. Crystalline solids
D. Polymeric molecules
|
| 26 |
The circuit in which current and voltage are in phase the power factor is.
|
A. Zero
B. Unity
C. Double
D. 4 times
|
| 27 |
The wavelength of X-rays is of the ofder of.
|
A. 10-14 m
B. 10-10 m
C. 10-9 m
D. 10-6 m
|
| 28 |
A person suffering from short sighted ness uses
|
A. Concave lens
B. Convex mirror
C. Convex lens
D. Concave mirror
|
| 29 |
Waves transfer
|
A. Frequency
B. Velocity
C. Energy
D. Wavelength
|
| 30 |
Bracket and plunk series of spectral lines lye in the
|
A. Visible region
B. Ultraviolet region
C. Far infrared region
D. Infrared region
|