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Q.1
The time period of a pendulum when taken to the Moon would:
Remain the same
Decrease
Become zero
Increase
Q.2
"God Particle" is
Neutrino
Higgs Boson
Meson
Positron
Q.3
Which among the following waves is used for communication by artificial satellites ?
Micro waves
Radio waves
A. M.
Frequency of 1016 series
Q.4
Modem is used mostly for ?
A modern empty memory modules
Connecting to internet
Mostly for file system
All the above
Q.5
The layer of atmosphere used for radio-wave transmission is
Chromosphere
Troposphere
Ionosphere
Stratosphere
Q.6
The audio signals of TV are
Amplitude modulated
Frequency modulated
Unmodulated
Velocity modulated
Q.7
What frequency range is the high frequency band?
3 kHz
3 to 30 MHz
30 to 300 MHz
10 GHz
Q.8
A body falling through a liquid acquires a steady velocity is known as
End velocity
Touch down velocity
Terminal velocity
Steady state velocity
Q.9
Rotameter is used to measure
Vortex flow
Density of fluids
Velocity of fluid in pipes
Flow of fluids
Q.10
Siphon will fail to work if
The level of the liquid in the two vessels are at the same height
The temperature of the liquids in the two vessels are the same
The densities of the liquid in the two vessels are equal
Both its limbs are of unequal length
Q.11
Necessary element of change in solar energy to electrical energy
Berillium
Silicon
Tantelum
Pure Copper
Q.12
The blue colour of water in the sea is due to
Absorption of other colours except blue by water molecules
Scattering of blue light by water molecules
Reflection of blue light by impurities in sea water
Reflection of blue sky by sea water
Q.13
The waveform of a certain signal can be studied by
Spectrometer
Cathode ray oscilloscope
P – n junction diode
Sonometer
Q.14
In a photocell light energy is converted into
Potential energy
Chemical energy
Heat energy
Electrical energy
Q.15
A voltaic cell converts chemical energy to
Heat energy
Electrical energy
Mechanical energy
Light energy
Q.16
Which of the following has the highest frequency?
Cosmic rays
X-rays
Radio waves
Microwaves
Q.17
Choose the most appropriate answer: In which atmospheric layer are the communication satellites located?
Stratosphere
Ionosphere
Troposphere
Mesosphere
Q.18
In an optical fibre the signal is transmitted
In a straight line path
In a curved path
Due to total internal reflection
Due to refraction
Q.19
The spoon dropped by an astronaut in a satellite will
Fall to the floor
Remain stationary
Continue to follow the motion of the satellite
Move tangentially away
Q.20
An aircraft can perform aerobatic manoeuvres in a vertical loop because of
Gravity
Centripetal force
Weight
Centrifugal force
Q.21
Sprayer functions on
Bernouli's principle
Archemede's principle
Pascal's law
Floatation principle
Q.22
In hydro power station, the motion produced in turbines is due to
Flow of water
Burning of coal
Burning of diesel
Production of steam
Q.23
The SI unit for measuring work and energy is
Joule
Watt
Farad
Ohm
Q.24
If a person moves a trolley for a distance of 10 m with a force of 50 N, then the work done is
0.2 J
5 J
20 J
500 J
Q.25
The bending of light when it passes around a corner or a slit is due to ________
Reflection
Refraction
Diffraction
Total internal reflection
Q.26
The GPS device in an automobile uses which communication channel?
Satellite
Microwave
Radio frequency
Infrared
Q.27
In a optical fibre cable, the signal is propagated along the
Inner Core
Cladding
Both core and cladding
Surface and cladding
Q.28
The work done by the string of a simple pendulum during one complete oscillation is equal to
Total energy of the pendulum
Kinetic energy of the pendulum
Potential energy of the pendulum
Zero
Q.29
Conversion of sound energy into electrical energy is done by
Solar cell
Gramophone
Microphone
Loudspeaker
Q.30
Work done in a free expansion process is
Minimun
0
Maximum
None of the above
Q.31
Which one is not a part of Kepler's Law?
Law of orbits
Law of areas
Law of speed
Law of periods
Q.32
Kepler's law of planetary motion states that the square of the time period is proportional to the
Semi-major axis
Square of the semi-major axis
Cube of the semi-major axis
Fourth power of the semi-major axis
Q.33
A body of mass 2 kg is thrown upward with initial velocity of 20 m/s. After 2 seconds, its kinetic energy will be : (g = 10 m/s
2
)
0 J
200 J
400 J
100 J
Q.34
How much calorie of energy is released by a boiled egg ?
40
50
60
77
Q.35
A stone is dropped from the roof of a house towards the ground. The kinetic energy of the stone will be maximum:
Just after it is dropped
When it is just on the half-way
Just before it touches the ground
When it touches the ground
Q.36
A drop of liquid assumes spherical shape because:
Intermolecular forces are strong in liquids
A sphere has the least surface area for a given volume
A sphere has the largest surface area for a given volume
Inter molecular forces are weak in liquids
Q.37
Which Color has the Longest Wavelength?
Violet
Yellow
Red
White
Q.38
The colour of sky appears blue due to
Reflection
Refraction
Scattering of shorter wave lengths
Dispersion
Q.39
For a freely falling body, the sum of kinetic energy and potential energy is always
Zero
Unity
Same
Variable
Q.40
A body of 4.0 kg is lying at rest. Under the action of a constant force, it gains a speed of 5 m/s. The work done by the force will be ________
50 J
30 J
20 J
40 J
Q.41
In a rechargeable cell what kind of energy is stored within the cell?
Electrical energy
Potential energy
Chemical energy
Kinetic energy
Q.42
A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is
Zero
One
Less than one
More than one
Q.43
The colour of the ocean appears to be blue because the sunlight falling on it is
Reflected
Refracted
Diffracted
Scattered
Q.44
Which of the following statements is true when we see ''rainbow' ?
We face sun and raindrops
The Sun remains behind us and we face raindrops
In light rainfall, we face Sun
The sky remains clear and the sun is at lower position in the sky
Q.45
What is the other name of Galileo's law of falling bodies?
Law of motion
Newton's first law
Newton's second law
Newton's third law
Q.46
An object of 10 kg is moving with a speed of 2 m/s. The kinetic energy of the object is
20 J
25 J
10 J
40 J
Q.47
If both the mass and the velocity of a body is increased to twice of their magnitude, the kinetic energy will increase by
2 times
4 times
8 times
16 times
Q.48
The energy stored in a watch spring is
Kinetic energy
Potential energy
Heat energy
Chemical energy
Q.49
An object that has kinetic energy must be
At an elevated position
Falling
At rest
Moving
Q.50
A 4 kg object is moving horizontally with a speed of 5 m/s. To increase its speed to 10 m/s, the amount of net work required to be done on this object is:
150 J
100 J
50 J
75 J
0 h : 0 m : 1 s
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