| 1 |
Two waves which combine to produce a resultant by reinforcing each other of every point demonstrate.
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A. Destructive interference
B. constructive interference
C. Refraction
D. polarization
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| 2 |
Wave theory of light was proposed by
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A. Newton
B. Thomas Young
C. Maxwell
D. Huygen
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| 3 |
An instrument used to find the direction of the earths magnetic field is known as.
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A. Magnetometer
B. Electroscope
C. Cyclotron
D. Particle accelerator
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| 4 |
Which of the following factor will not affect the speed of sound i a medium.
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A. Temperature
B. Pressure
C. Humidity
D. Mass
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| 5 |
If two different masses have same momentum then the lighter one has more.
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A. K.E. and velocity
B. Velocity only
C. Both K.E. and P.E.
D. Only P.E
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| 6 |
Which of the following is a method of energy transfer.
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A. Conduction
B. Wave motion
C. Radiation
D. All of these
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| 7 |
The most convenient unit for energy at the atomic level is.
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A. Joule
B. Watt second
C. Newton metre
D. Electron volt
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| 8 |
The force that moves a rocket or a plane forward is called.
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A. Lift
B. drag
C. Thrust
D. Turbulence
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| 9 |
Who is generally credited with the invention of first optical microscope.
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A. Hans Lippershery
B. Glavanni faber
C. Galileo
D. issac Newton
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| 10 |
A physical quantity not directly involved in rotating motion is.
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A. Moment of inertia
B. Mass
C. Angular velocity
D. Torque
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| 11 |
For which position, will the maximum blood pressure in the body have the smallest value.
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A. Standing up right
B. Sitting relaed
C. Lying horizontally
D. Standing on one's head
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| 12 |
The SI unit of modulus of elasticity us
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A. N m-2
B. N m-1
C. N m
D. N m -3
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| 13 |
If velocity is doubled then
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A. Momentum increase 4 time and K.E. increase 2 times
B. Momentum increases 2 times and K.E. remains constant
C. Momentum increases 2 times and K.E. increases 4 times
D. Both momentum and K.E. remain constant
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| 14 |
Surface tension of a liquid may be defined as
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A. Heat energy per unit area
B. P.E. per unit area
C. surface energy per unit area
D. K.E. per unit area
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| 15 |
The product of velocity and cross sectional are for a liquid flowing through a pipe is a measure of the.
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A. Rate of flow
B. Volume of fluid
C. Fluid pressure
D. Fluid friction
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| 16 |
In the free expansion of a perfect gas there is no.
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A. work done
B. Heat exchnged
C. Internal energy changed
D. All of the above
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| 17 |
The length of Galilean telescope is given by
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A. fo + fe
B. fo- fe
C. 1/fo - 1/fe
D. 1/fo = 1/fe
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| 18 |
the depth of a pond is 4 m What is the apparent depth of the pond if the water level is 3.5 m high. The refractive index of water is 1.33
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A. 1.9 m
B. 2.3 m
C. 3.13 m
D. 4.5 m
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| 19 |
Resistance and resistivity of a substance
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A. Increase with rise in temperature
B. Decrease with rise in temperature
C. Remains same at every temperature
D. Increases at high voltage
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| 20 |
The SI unit of angular momentum is.
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A. kg m-1 s
B. kg m2 s
C. kg m s-1
D. kg m2 s-1
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| 21 |
In de Brogile model electron orbit must form
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A. Spectrum
B. Wave packets
C. Franhoffer lines
D. Clouds
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| 22 |
X-rays travels ins straight line with velocity
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A. Less than light
B. Greater than light
C. Equal to light
D. Equal to sound
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| 23 |
Which electrical component may be used to store electrical energy in a time delay circuit
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A. Capacitor
B. Light dependent resistor
C. Resistor
D. Thermistor
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| 24 |
For which material magnetic susceptibility is negative.
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A. Paramagnetic
B. Diamagnetic
C. Ferromagnetic
D. All of these
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| 25 |
Usually in an operational amplifier the inputs used are of
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A. Equal voltage and same polarity
B. Equal voltage and opposite polarity
C. Different voltage and same polarity
D. Different voltage and opposite polarity
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| 26 |
Viscosity of fluids with rise in temperature.
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A. Increases
B. Decreases
C. Remains constant
D. Vanishes
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| 27 |
When a force of 4 N acts on a body of mass 2 kg for a time of 2 s, the rate of change of momentum is.
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A. 2 kg ms -1
B. 4 kg ms-1
C. 8 kg m s-1
D. 16 kg m s-1
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| 28 |
The dioptre power of concave lens of 10 cm focal length is.
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A. 0.1 dioptre
B. 1.0 diopter
C. 10 dioptre
D. -10 dioptre
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| 29 |
Which of the following proves that light waves are transverse in nature.
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A. Diffraction
B. Interference
C. Polarization
D. Refraction
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| 30 |
When the frequency of A.C in L - C- R circuit is incrased the impedance of L-C-R circuit.
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A. Increase
B. Decrease
C. Remain unchanged
D. First decrease and then increases
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