| 1 |
The fluid is incompressible, if itsdensity is
|
A. zero
B. constant
C. very high
D. very small
|
| 2 |
When a mass 'm' is pulled slowly, the spring stretches by an amount xo, then the work done will be
|
A. W=Kxo
B. W=1/2Kxo
C. W=1/2Kx2o
D. W=4Kxo
|
| 3 |
When the total displacement is divided by total time taken, we get:
|
A. Velocity
B. Average speed
C. Average velocity
D. None of these
|
| 4 |
An emf is set up in a conductor when it
|
A. Is kept in a magnetic field
B. Is kept in an electric field
C. Moves across a magnetic field
D. Both A and B
|
| 5 |
A car is turning around a corner at 10 m/sec as it travels along an arc of a circle. If value of centripetal acceleration is 10 m/sec2in this case, find radius of the circular path:
|
A. 1 m
B. 5 m
C. 10 m
D. 15 m
|
| 6 |
When a body moves with a constant speed in a circle:
|
A. No work is done on it
B. No acceleration is produced in the body
C. Velocity remains constant
D. None of these
|
| 7 |
There is no way to detect:
|
A. Absolute uniform motion
B. Accelerated motion
C. State rest
D. State of motion
|
| 8 |
Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:
|
A. N = nNAm = MNA
B. n = N NA, M = mNA
C. M = NA/N , NA= m/n
D. N = nNA, M = mNA
|
| 9 |
When radioactive nucleus emits aβ-particle, the proton-neutron ratio
|
A. decrease
B. increase
C. same
D. none of these
|
| 10 |
How many number of anodes used in electron gun
|
A. one
B. two
C. three
D. six
|
| 11 |
Newton published laws of motion in his famous book "principia" in
|
A. 1867
B. 1667
C. 1676
D. 1687
|
| 12 |
The collision in which KE is conserved but momentum is not conserved is called:
|
A. Elastic collision
B. Inelastic collision
C. any these
D. None of these
|
| 13 |
Faraday's law of electromagnetic induction has been used in the construction of:
|
A. Galvanometer
B. Voltmeter
C. Electric motor
D. Electric genrator
|
| 14 |
A signal is amplified at the output without any change of phase, if it is applied at the
|
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
|
| 15 |
SHM is type of ______ motion
|
A. Vibratory
B. Linear
C. Circular
D. None
|
| 16 |
If the mass of the simple pendulum becomes double, its time period
|
A. increase
B. decreases
C. remains constant
D. none of them
|
| 17 |
The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of
|
A. power
B. current
C. resistance
D. temperature
|
| 18 |
The direction of the acceleration is the same as that of
|
A. speed
B. velocity
C. both of them
D. none of them
|
| 19 |
If a mass of 10 gm is suspended from a spring of k = 9.8 Nm-1, then the extension will be:
|
A. 1 cm
B. 1 m
C. 10 mm
D. None of these
|
| 20 |
The smooth or steady streamline flow is known as
|
A. laminar flow
B. turbulent flow
C. both of them
D. none of them
|
| 21 |
One radian is:
|
A. Greater than one degree
B. Less than one degree
C. Equal to one degree
D. None of these
|
| 22 |
The phase angle of a series RLC circuit at resonance is
|
A. 180°
B. 90°
C. 0°
D. None of the these
|
| 23 |
A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, Which makes an angle of 60° with the horizontal. The work done by the boy is:
|
A. 1.25 J
B. 12.5 J
C. 125 J
D. None of these
|
| 24 |
The locus of all points in a medium having same phase of vibration is called
|
A. Crest
B. Trough
C. Wavelength
D. Wave-front
|
| 25 |
The behaviour of gases is well accounted by the kinetic theory based on
|
A. microscopic approach
B. macroscopic approach
C. both of them
D. none of them
|
| 26 |
When a mass 'm' is pulled slowly through a distance 'xo' , the elastic potential energy of the spring would be
|
A. P.E=Kx2o
B. P.E= 1/2kxo
C. P.E=1/2Kx2o
D. P.E=Kx2o
|
| 27 |
A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:
|
A. 49 rad/sec2
B. 1 rad/sec2
C. 0.16 rev/sec2
D. Both A and C
|
| 28 |
In case of point source of light, shape of wavefront is
|
A. Spherical
B. Cylindrical
C. Plane
D. None of above
|
| 29 |
If two forces of magnitudes 3.5 and 2.5 N act on a body such that the angle between the forces is zero, then magnitude of the resultant will be:
|
A. 1.0 N
B. 6 N
C. 3.5 N
D. 12 N
|
| 30 |
An object undergoes S.H.M has maximum acceleration when its displacement form the means position
|
A. maximum
B. zero
C. half of the maximum value
D. one third of the maximum value
|