| 1 |
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
|
| 2 |
The density of water is 103kg/m3. The water pressure on a submarine is 2.0 x 107N/m2. The depth of the submarine below the surface of the water, in maters, is approximately
|
A. 200 m
B. 11000 m
C. 2000 m
D. 8000 m
|
| 3 |
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
|
| 4 |
The e/m of an electron moving in a circular path in a magnetic field is equal to
|
A. V/Br
B. V/B2r2
C. V2/Br2
D. V2/Br
|
| 5 |
When two spherical
conducting balls at different potentials are joined by metallic wire, the
current starts:
|
A. Decreasing from zero to
maximum
B. Increasing from zero to
maximum
C. Decreasing
from maximum to zero
D. Increasing from maximum
to zero
|
| 6 |
If the volume of the gas is to be increased by 4 times, then
|
A. Temperature and pressure must be doubled
B. At constant P the temperature must be increased by 4 times
C. At constant T the pressure must be increased by four times
D. It cannot be increased
|
| 7 |
Example of vibratory motion is
|
A. mass suspended from a spring
B. a bob of simple pendulum
C. mass attached to a spring placed
D. all of them
|
| 8 |
X-ray are also known as
|
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
|
| 9 |
Which of the following changes at an antinode in a stationary wave?
|
A. Density only
B. Pressure only
C. Both pressure and density
D. Neither pressure nor density
|
| 10 |
Biomass includes:
|
A. Crop residue
B. Natural vegetation
C. Animal dung
D. All of these
|
| 11 |
Equal charges are given to two spheres of different radii. The potential will
|
A. Be more on the smaller sphere
B. Be more on the bigger sphere
C. Be equal on both the sphere
D. Depend on the nature of the material of the sphere
|
| 12 |
A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is
|
A. Charge Q
B. Potential V
C. Capacity
D. Energy U
|
| 13 |
dimensions are the same for:
|
A. Work and energy
B. Force and weight
C. None of these
D. Both a and b
|
| 14 |
The penetration power ofβ-particle is
|
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
|
| 15 |
The pressure exerted by the gas is
|
A. directly proportional to the P.E
B. inversely proportional to the P.E
C. inversely proportional to the K.E
D. directly proportional to the K.E
|
| 16 |
The value for systolic blood pressure for a normal healthy person is
|
A. 140 torr
B. 80 torr
C. 90 torr
D. 120 torr
|
| 17 |
In the reverse process, the working substance passes through the same stages as in the direct process and
|
A. thermal effects at each stage are exactly reversed
B. mechanical effects at each stage are exactly reversed
C. thermal and mechanical effects at each stage remain the same
D. thermal and mechanical effects at each stage are exactly reversed
|
| 18 |
A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:
|
A. Ideal gas
B. Inert gas
C. Real gas
D. None of these
|
| 19 |
The product of force and time is called
|
A. acceleration
B. linear momentum
C. angular momentum
D. impulse
|
| 20 |
Density of oxygen is about 16 times that of hydrogen therefore if speed of hydrogen is x, then speed of oxygen.
|
A. Greater than x
B. The same
C. Less than x
D. Depending upon the pressure of gases
|
| 21 |
A ball is dropped from a height of 4.2 meters. To what height it will rise if there is no loss of KE after rebounding?
|
A. 4.2 m
B. 8.4
C. 12.6
D. None of these
|
| 22 |
Experiments revealed that the ratio of the stress to the strain is a constant value for
|
A. different material
B. all materials
C. a given material
D. all of them
|
| 23 |
SHM is type of ______ motion
|
A. Vibratory
B. Linear
C. Circular
D. None
|
| 24 |
Satellites are held in orbits around Earth by its:
|
A. Gravitational field
B. Magnetic field
C. Own orbital motion
D. Own spin motion
|
| 25 |
The magnetic field in the middle of a solenoid due to current is
|
A. weak
B. strong and uniform
C. none-uniform
D. zero
|
| 26 |
The reverse saturation current in a PN junction diode is only due to
|
A. Majority carriers
B. Minority Carriers
C. Acceptor ions
D. Donor ions
|
| 27 |
Wave length of that color as compared to that of violet color is:
|
A. Smaller
B. Longer
C. Equal
D. None of these
|
| 28 |
The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as
|
A. voltmeters
B. resistance
C. electrode
D. current
|
| 29 |
A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be
|
A. 64 W
B. 80 W
C. 100 W
D. 125 W
|
| 30 |
A second's pendulum is a pendulum whose time period is
|
A. 1 second
B. 2 seconds
C. 3 seconds
D. 4 seconds
|