| 1 |
The value of the plank's constant 'h' is given by
|
A. 1.6 x 10-19J
B. 1.67 x 10-27Kg
C. 6.63 x 1034Js
D. 6.63 x 10-34Js
|
| 2 |
Which one of the followings can act approximately as a source of monochromatic light
|
A. Neon lamp
B. Fluorescent tube
C. Sodium lamp
D. None of these
|
| 3 |
The pattern of NaCl particles have a shape which is :
|
A. Cubic
B. Body centred cubic
C. Simple cubic
D. face centred
|
| 4 |
At what temperature the adiabatic change is equivalent to the isothermal change?
|
A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature
|
| 5 |
Tick the conservation force:
|
A. Tension in a string
B. Air resistance force
C. Elastic spring
D. Frictional force
|
| 6 |
Direction of angular momentum is determined by:
|
A. Right hand rule
B. Head to tail rule
C. Left hand rule
D. None of them
|
| 7 |
A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when:
|
A. The coil is distorted
B. The coil is rotated
C. The coil is neither distorted nor rotated
D. Both A and B
|
| 8 |
In a three phase a.c. generator, there are
|
A. 2 coils
B. 3 coils
C. 1 coild
D. No coil
|
| 9 |
If the velocity time graph is a straight line parallel to time-axis, then it means that:
|
A. The body is moving with uniform velocity
B. The body is moving with uniform acceleration
C. The body is at rest
D. None of above
|
| 10 |
When the pn-junction is forward biased. the current flows through it is of the order of
|
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
|
| 11 |
In a metal, the valence electrons are:
|
A. Attach to individual
atoms
B. Not attached to
individual atoms
C. Free to move within the
metal
|
| 12 |
The earth's potential is taken as
|
A. Negative
B. Positive
C. Zero
D. Infinite
|
| 13 |
When two objects are rubbed together, their internal energy
|
A. remains same
B. decreases
C. remains the same then decreases
D. increases
|
| 14 |
The relation V = IR represents
|
A. Ampere law
B. Faraday's law
C. Ohm's law
D. Len's law
|
| 15 |
A current carrying write loop is placed in between the poles of a magnet as shown in the figure below. The direction of current flow is also shown in the figure with respect to the axis, the wire loop will tend to.
|
A. Rotate clockwise
B. Note move at all
C. Rotate anti-clock wise
D. Move towards magnetic north
|
| 16 |
The missing mass which is converted to energy in the formation of nucleus, is called
|
A. packing fraction
B. mass defect
C. binding energy
D. none of these
|
| 17 |
Laws of reflection and refraction can also be explained by:
|
A. Particle nature of light
B. Quantum nature of light
C. Wave nature of light
D. Complex nature of light
|
| 18 |
The distance from eye to near point is taken as:
|
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
|
| 19 |
The current is measured in
|
A. volts
B. watt
C. ampere
D. ohm
|
| 20 |
The conventional current is the name given to
current due to flow of:
|
A. Positrons
|
| 21 |
When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be
|
A. 45°
B. 90°
C. 135°
D. 180°
|
| 22 |
Where the streamlines are very far apart from each other, the pressure will be
|
A. low
B. zero
C. high
D. all of them
|
| 23 |
Huygen principle is used to determine:
|
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
|
| 24 |
The A.M. transmission frequency range from
|
A. 500-1000 KHz
B. 540-1600 KHz
C. 300-490 KHz
D. 900-2040 KHz
|
| 25 |
If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of
|
A. second law thermodynamics
B. first law of thermodynamics
C. third law of thermodynamics
D. none of them
|
| 26 |
Thermistors are prepared under
|
A. High pressure and low temperature
B. High pressure and high temperature
C. Low pressure and low temperature
D. Low pressure and high temprature
|
| 27 |
Data transmitted along glass-fiber cables is in the form of pulses of monochromatic red light each of duration 2.5 ns. Which of the following is the best estimate of the number of wavelength in each pulse?
|
A. 103
B. 106
C. 109
D. 1012
|
| 28 |
The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed
|
A. parallel to the field
B. Perpendicular to the field
C. At an angle of 45 to the field
D. None of the above
|
| 29 |
When the shear stress and shear stain are involved, then their ratio is called
|
A. Young's modulus
B. Bulk modulus
C. Shear modulus
D. all of them
|
| 30 |
Light year is a unit of
|
A. Time
B. Distance
C. Velocity
D. Intensity of light
|