| 1 |
A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is
|
A. 8 J
B. 16 J
C. 4 x 10-3J
D. 2 x 10-3J
|
| 2 |
The magnetic field in the middle of a solenoid due to current is
|
A. weak
B. strong and uniform
C. none-uniform
D. zero
|
| 3 |
Shock absorber of the car is an example of
|
A. resonance
B. forced oscillations
C. interference
D. damped oscillations
|
| 4 |
The product of the pressure and volume of an ideal gas is
|
A. A constant
B. Approximately equal to the universal gas constant
C. Directly proportional to its temperature
D. Inversely proportional to its temperature
|
| 5 |
Photons must have energy equal to
|
A. ev
B. En
C. hf
D. None of these
|
| 6 |
The force exerted by the fluid in a hydraulic pump on the piston is 10 cm2, the fluid pressure on the piston is, in N/cm2
|
A. 20
B. 200
C. 2000
D. 20,000
|
| 7 |
A the top of the trajectory of a projectile, the directions of its velocity and acceleration are
|
A. Perpendicular to each other
B. Parallel to each other
C. Inclined to each other at an angle of 45°
D. Anitparallel to each other
|
| 8 |
The substances in which, atom are so oriented that their fields support each other and the atoms behave like tiny magnets, are called
|
A. diamagnetic substances
B. ferromagnetic substances
C. paramagnetic substances
D. all of them
|
| 9 |
An oscillating body oscillates due to:
|
A. Applied force
B. Restoring force
C. Frictional force
D. None of these
|
| 10 |
The magnitude of
chemical Effects depends upon:
|
B. Quantity of Electricity
passed through the liquid
|
| 11 |
The temperature at which the speed of sound becomes double as was at 27°C is
|
A. 273°C
B. 0°C
C. 927°C
D. 1027°C
|
| 12 |
Escape velocity from surface of Moon as compared to that from Earth surface is:
|
A. Greater
B. Smaller
C. Equal
D. None of thes
|
| 13 |
When some compass needles are placed on a card
board along a circle with the center at the wire, they will
|
A. Point
the direction of N-S
B. Set themselves tangential
to the circle
C. Point in the direction
of E-W
|
| 14 |
When the emitter-base junction of a transistor is reverse biased, collector current
|
A. Reverses
B. Increases
C. Decreases
D. Stops
|
| 15 |
Substances that do not flow easily have
|
A. large coefficient of viscosity
B. small coefficient of viscosity
C. either of them
D. none of them
|
| 16 |
if the field is directed along the normal to the
area, then flux is:
|
|
| 17 |
On colliding in a closed container, the gas molecules
|
A. Transfer momentum to the walls
B. Momentum becomes zero
C. Move in opposite directions
D. Perform Brownian motion
|
| 18 |
If the acceleration of a body is not uniform, then velocity-time graph will be:
|
A. Curve
B. Straight line
C. Sphere
D. All of these
|
| 19 |
When there is no relative motion between the magnet and coil, the galvanometer indicates:
|
A. No current in circuit
B. An increasing current
C. A decreasing current
D. Either B or C
|
| 20 |
In the formula R = N x m for diffraction grating, N denotes:
|
A. No. of lines/cm
B. No. of lines/meter
C. Total number of lines
D. None of above
|
| 21 |
The law of conservation of mass gives us the
|
A. equation of continuity
B. Bernoulli's theorem
C. both of them
D. none of them
|
| 22 |
When a body moves along a circular path with constant speed, it has an acceleration, which is always directed
|
A. Along the tangent
B. Towards the centre
C. Away from the centre
D. None of them
|
| 23 |
In an interference pattern of Young's double slit(YDS) experiment:
|
A. Bright fringesare wider than dark fringes
B. Dark fringes are wider than bright fringes
C. Both dark and bright fringes are of equal width
D.
Central fringes are wider than the outer fringes
|
| 24 |
Surface tension of water is due to
|
A. Inter molecular attractions
B. Inter molecular spaces
C. Inter molecular repulsion
D. None of above
|
| 25 |
The appearance of the colour in the soap (oil) film results from:
|
A. Dispersion
B. Interference
C. Reflection
D. Refraction
|
| 26 |
the dilation of time applies to the timing processes which are:
|
A. Physical
B. Chemical
C. Biological
D. All of these
|
| 27 |
The first shell near the neucles is
|
A. L-shell
B. X-shell
C. N-shell
D. M-shell
|
| 28 |
The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of
|
A. 2 cm/s
B. 20 cm/s
C. 200 cm/s
D. 2000 cm/s
|
| 29 |
Fluids can transmit:
|
A. Transverse wave
B. Compressional wave
C. Both of them
D. None of them
|
| 30 |
Bernoulli's equation is based upon law of conservation
|
A. Mass
B. Momentum
C. Energy
D. None of these
|