| 1 |
Inserting a di electric between the plates of a charged parallel plate capacitor.
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A. Decrease the capacitance
B. Leaves teh capacitance the same
C. Encourages breakdown between the plates
D. Reduces the electric intensity between the plates
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| 2 |
The consumption of energy by a 60 W bulb in 2 s is
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A. 0.02 J
B. 30 J
C. 60 J
D. 120 J
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| 3 |
The average amount of energy transported by a wave per unit area per unit time is termed as
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A. Wave speed
B. Wave intensity
C. Wavelength
D. Wave amplitude
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| 4 |
Which of the following are electromagnetic waves.
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A. Alpha particles
B. Beta particles
C. Gama rays
D. Water waves
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| 5 |
A shell explodes and many pieces fly off in different directions, which of the following is conserved.
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A. Momentum
B. K.E.
C. Momentum and K.E
D. Neither momentum nor K.E.
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| 6 |
If the average velocity of an object is zero in some time internal the displacement of the object for that intercanal will be.
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A. Infinite
B. zero
C. Increase
D. Decreasing
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| 7 |
The sensitivity of the galvanometer can be increased by increasing the
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A. Number of turns of the coil
B. Area of the coil
C. Strength of the magnetic field
D. All of the above
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| 8 |
Reciprocal of the focal length is called.
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A. Radios of curvature of the lens
B. Power of the lens
C. Aperture of the lens
D. Resolving power
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| 9 |
A generator produces 100 kW of power of a potential difference of 10 kV the power is transmitted through cables of total resistance 5 Homs How much power is dissipated in the cables.
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A. 50 W
B. 250 W
C. 500 W
D. 5,000 W
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| 10 |
Simple harmonic motion may be assumed as a projectio of uniform circular motion along a
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A. Diagonal
B. hypotenuse
C. Diameter
D. Radius
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| 11 |
Which current can pass through a capacitor continuously.
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A. Alternating current
B. Direct current
C. Eddy current
D. Pulsating current
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| 12 |
We can hear beats when the difference in the frequencies of two sounding bodies is not more than.
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A. 2
B. 4
C. 6
D. 10
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| 13 |
The part of theory of relativity which deals with accelerated bodies is called.
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A. special theory of relativity
B. General theory of relativity
C. Lorentz's theory of relativity
D. Galilean theory of relativity
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| 14 |
Compton scattering experiment seemed to indicate that radiation had
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A. Wave nature
B. Particle nature
C. Wave particle nature
D. X-rays nature
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| 15 |
The unit of intensity of sound waves is.
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A. W m-1
B. W m-2
C. N m-1
D. N m-2
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| 16 |
Rate of flow of a liquid is expressed in
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A. Litre m-3
B. Litre s-1
C. Litre m-1
D. Litre s
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| 17 |
X-rays are
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A. Longitudinal wave
B. Transvers waves
C. Secondary waves
D. Fast sound waves
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| 18 |
Newton's first law of motion provides the definition of.
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A. Distance
B. Force
C. Vector
D. Acceleration
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| 19 |
The buoyancy depends upon the
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A. Depth to which the body is immersed
B. Shape of the body
C. Mass of the body
D. Mass of the liquid displaced
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| 20 |
In a transistor which one is very thin.
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A. Collector
B. Emitter
C. Base
D. Depletion region
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| 21 |
The spectrum of radiation due to transitions between energy levels in an atom, other absorption or emission is called.
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A. Atomic spectrum
B. Molecular spectrum
C. Grating spectrum
D. Normal specturm
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| 22 |
Why choke coil is used in an AC circuit.
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A. To decrease D.C.
B. To increases A.C.
C. To decreases A.C
D. To increase D.C
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| 23 |
In the Geiger Marsden experiment a narrow beam of alpha particles was fired at a thin piece of Gold foil in a vacuum Some of the particles were scattered though large angles The result of the experiment provided evidence for the existence of.
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A. A very small charged nucleus
B. electrons orbiting the nucleus
C. Neutrons in the nucleus
D. Nuclear reaction
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| 24 |
What is the overall gain, if three amplifiers each with a gain of 30 are cacaded.
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A. 30
B. 90
C. 270
D. 27,000
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| 25 |
What happens to internal energy of a piece of lead when hammered.
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A. Increases
B. Decreases
C. Remains unchanged
D. Becomes zero
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| 26 |
Which law states that magnetization is inversely proportional to temperature for a fixed value fo the field.
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A. Curie's law
B. Voltmeter
C. Ammeter
D. Wattmeter
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| 27 |
If two gases have same reduced pressure volume and temperature it is according to
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A. Boyle's law
B. Charles law
C. Law of corresponding state
D. Zeroth law
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| 28 |
In which of the following eddy current is not used
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A. Induction furnace
B. Automobile speedometer
C. Electromagnetic damping
D. X- rays diffraction
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| 29 |
Out of the following pairs, which one does not have te same dimensions.
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A. Force and weight
B. Pressure and stress
C. Energy and work
D. Momentum and torque
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| 30 |
When 5 C of charge flows through a particular resistor 10 J of energy is converted What is the p.d. across the resistor.
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A. 0.5 V
B. 2.0 V
C. 15 V
D. 50 V
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