| 1 |
Heat Carnot be transferred from a colder to a hotter region unless work is done This is the statement of.
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A. Firs law of thermodynamics
B. Second law of thermodynamics
C. Third law of thermodynamics
D. Zeroth law of thermodynamcis
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| 2 |
Liquids with disordered structure frozen in are an example of
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A. Amorphous solids
B. Glassy solids
C. Crystalline solids
D. Polymeric molecules
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| 3 |
Rate of change of momentum is called.
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A. Torque
B. Force
C. Impulse
D. Inertia
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| 4 |
If the base emitter junction is forward biased and base collector junction is reverse biased the BJT is in.
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A. cut of mode
B. Amplification mode
C. Saturation mode
D. Inversion mode
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| 5 |
Interference effects of light were verified by
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A. Thomas Young
B. Newton
C. Bragg
D. Huygen
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| 6 |
If the specific latent heat of vaporization of oxygen is 214 kJ kg-1 how much heat will be absorbed when 3.0 kg of oxygen is boiled off at its boiling point.
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A. 14 kJ
B. 64 k J
C. 140 kJ
D. 642 k j
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| 7 |
During an adiabatic gas expansion the environment
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A. Serves as a heat sink
B. Serves as a heat source
C. Must be at a higher temperature than the gas
D. Does not have to participate
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| 8 |
Increase in velocity of sound in air for 1 oC rise in temperature is.
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A. 0.61 m s-1
B. 1.61 m s-1
C. 2.00 m s-1
D. 61.0 m s-1
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| 9 |
Marie Curie and Pierre Curie discovered two new radioactive elements which are.
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A. Uranium and radkum
B. Platinum and radium
C. Polonium and radium
D. Crypton and radon
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| 10 |
The most suitable material for moderator in a nuclear reactor is.
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A. B
B. Cd
C. D2O
D. Uranium
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| 11 |
The electric heater takes a current of 4 A from a 250 V supply . How long would it take the heater to convert 400,000 J of electric energy.
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A. 100 s
C. 400 s
D. 750 s
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| 12 |
Which liquid can flow easily.
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A. Traacle
B. Pitch
C. Ether
D. All flow with same rate
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| 13 |
Which instrument measures the magnification of a telescope.
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A. lactometer
B. dynamometer
C. Wattmeter
D. Ammeter
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| 14 |
The force that bonds protons and neutrons together int he nucleus despite the electrical repulsion of the protons is called.
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A. Molecular force
B. Nuclear force
C. Atomic force
D. Gravitational force
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| 15 |
A device used to detect and measure charge is.
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A. A voltmeter
B. An ammeter
C. An electroscope
D. An amplifier
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| 16 |
When Electric current flows through the wire it increases.
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A. P.E of the atoms
B. K.E. of the atomss
C. Atomic size
D. Number of protons
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| 17 |
If a di electric is placed between the plates of a capacitor, its capacitance.
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A. Decreases
B. Increases
C. Remains unaffected
D. Is zero
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| 18 |
Which temperature is the absolute measure of temperature.
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A. Thermodynamic temperature
B. Freezing point
C. Boiling point
D. Absolute zero
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| 19 |
When using the formula E = h lambda what unit should energy have.
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A. Joule
B. Watt second
C. Newton metre
D. Electron volt
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| 20 |
What will be the effect on the speed of a Transerv wave in a string. If tension is made 4 times.
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A. Remains the same
B. Increase a times
C. Becomes double
D. Becomes 3 times
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| 21 |
A vacuum diode conducts when plate
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A. Is negative w.r.t cathode
B. Is positive w.r.t. cathode
C. and cathode are at the same potential
D. Resistance is less
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| 22 |
The loss of mass in a.m.u in a nuclear change can be calculated from energy involved in MeV by
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A. Dividing by 931
B. Multiplying by 931
C. Diving by 391
D. Multiplying by 391
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| 23 |
The force of friction that comes into action after the motion has started
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A. Static friction
B. Dynamic friction
C. Friction only
D. Limiting friction
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| 24 |
A sound wave is an example of
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A. Transverse wave
B. longitudinal waves
C. Hair wave
D. Stationary wave
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| 25 |
The input resistance of a JFET is of the order of.
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A. 1 M Mega
B. 10 M Mega
C. 100 M Mega
D. 1,000 M Mega
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| 26 |
A number of spherical capacitors of different radii have same potentials The surface charge density on them
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A. I equal
B. Is proportional to their radii
C. Is inversely proportional to their radii
D. Is inversely proportional to square of their radii
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| 27 |
The value of voltage or current that exists in a circuit at any instant of time measured from some reference point is its.
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A. Peak value
B. Peak to peak value
C. Instantaneous value
D. Average value
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| 28 |
The path of a projectile is a
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A. Straight line
B. Circle
C. Ellipse
D. Parabola
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| 29 |
if two conductors in the same vicinity each possess one coulomb of charge of opposite sign when one volt potential difference in established between them we may say they possess
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A. A capacitance of one henry
B. An inductance of one henry
C. An impedance of one ohm
D. A capacitance of one farad
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| 30 |
The angular frequency time period and frequency in SHM not depend upon.
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A. Mass
B. Force constant
C. Amplitude
D. Restoring force
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