| 1 |
The fluid is incompressible, if itsdensity is
|
A. zero
B. constant
C. very high
D. very small
|
| 2 |
To sources are said to be coherent if they have:
|
A. Same amplitude
B. Same wavelength
C. Definite phase relation with each other
D. None of them
|
| 3 |
A certain force gives an acceleration of 2 m/sec2 to a body if mass 5 kg. The same force would give a 29 kg object an acceleration of:
|
A. 0.5 m/sec2
B. 5 m/sec2
C. 1.5 m/sec2
D. 9.8 m/sec2
|
| 4 |
The artillery shells travel along parabolic paths under the influence of
|
A. magnetic field
B. electric field
C. electromagnetic field
D. gravitational field
|
| 5 |
0.10 cm can be written as:
|
A. 1.0 x 10-2m
B. 1.0 x 10-3cm
C. 1.0 x 10-4cm
D. 1. x 10-4m
|
| 6 |
(CRO) Cathode ray oscilloscope is a device used for high speed
|
A. velocity
B. graph plotting
C. time-velocity
D. none of these
|
| 7 |
X-rays produced in a tube operating at 105V. The speed of X-rays produced is
|
A. 3 x 108m/s
B. 3.1 x 108m/s
C. 2.8 x 108m/s
D. 1.88 x 108m/s
|
| 8 |
A rotating wheel accelerates up to the value of 0.75 rev/sec2after 2 seconds of its start. Its angular velocity becomes:
|
A. 9.42 rad/sec
B. 2.6 rev/sec
C. 1.5 rev/sec
D. Both A and C
|
| 9 |
What must be changing when a body is accelerating uniformly?
|
A. the force acting on a body
B. the velocity of the body
C. the mass of the body
D. the speed of the body
|
| 10 |
As compared to the distance measured by an observer on Earth, the distance from Earth to a star measured by an observer in a moving spaceship would seem:
|
A. Smaller
B. Lerger
C. Same
D. Much larger
|
| 11 |
When the bob of simple pendulum is at mean position, its K.E will be
|
A. maximum
B. minimum
C. zero
D. all of them
|
| 12 |
According to the law of conservation of linear momentum, the total linear momentum of an isolated system
|
A. increases
B. decreases with time
C. remains constant
D. none of them
|
| 13 |
When the speed of a body in a fluid increases then the drag force
|
A. decreases
B. becomes zero
C. increases
D. non of them
|
| 14 |
If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us
|
A. parabola
B. straight line
C. hyper bola
D. ellipse
|
| 15 |
When two protons are brought are brought closer potential energy of both of them:
|
A. Increases
B. Decreases
C. Remains same
D. None of these
|
| 16 |
During the negative half-cycle of the half-wave rectification, the diode
|
A. does not conduct
B. conducts
C. either of these
D. none of these
|
| 17 |
A choke coil is used as a resistance in
|
A. d.c. circuit
B. a.c. circuit
C. d.c. potentiometer circuit
D. wheatstone bridge
|
| 18 |
The weight 'mg' of the bob is resolved into
|
A. one component
B. two components
C. three components
D. four components
|
| 19 |
Which of the following options states the names of fluids in the order of increasing viscosity?
|
A. mercury, motor oil, methanol
B. methanol, mercury, motor oil
C. motor oil, mercury, methanol
D. methanol, motor oil, mercury
|
| 20 |
When a body moves against the force of friction on a horizontal plane, the work done by the body is:
|
A. Positive
B. Negative
C. Zero
D. None of these
|
| 21 |
Motional emf is called motional:
|
A. Electromagnetic force and is measured in newtons
B. Electromotive force and is measured in volt
C. Electromotive force and is measured in newtons
D. Electromagnetic force and is measured in volts
|
| 22 |
The property of light which does not change with the nature of the medium is
|
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
|
| 23 |
What is the coefficient of mutual inductance, when the magnetic flux changes by 2 X 10-2Wb, and change in current is 0.01 A?
|
A. 2 H
B. 3 H
C. 1/2 H
D. Zero
|
| 24 |
The energy of a photon is represented by
|
A. h/c2
B. h/T
C. hc2
D. hf/c2
|
| 25 |
Velocity is a
|
A. scalar quantity
B. vector quantity
C. constant quantity
D. none of them
|
| 26 |
A two Kg block is held 1 m above the floor for 50 seconds, the work done is:
|
A. Zero
B. 10.2 J
C. 100 J
D. 980 J
|
| 27 |
On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands
|
A. adiabatically
B. isothermally
C. isochorically
D. isobarically
|
| 28 |
The system international (SI) is built from _______ kind of unites
|
A. Two
B. Three
C. Four
D. Five
|
| 29 |
An LED emits light when it is:
|
A. Forward biased
B. Reverse biased
C. Operated without battery
D. Operated with heat source
|
| 30 |
The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is
|
A. 10 KJ
B. 5 KJ
C. 2 KJ
D. 1 KJ
|