| 1 |
The r.m.s. value of alternating current is equal to its maximum value at angle of
|
A. 60°
B. 45°
C. 30°
D. 90°
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| 2 |
Xerography means:
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| 3 |
A swing has
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A. one natural frequency
B. two natural frequencies
C. three natural frequencies
D. four natural frequencies
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| 4 |
Particles have the mass smallest of following is
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A. Electron
B. Proton
C. Neutron
D. Quark
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| 5 |
The output voltage of half wave rectification is in the form of
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A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above
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| 6 |
The internal energy of an ideal gas system is generally the
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A. translational K.E of molecules
B. vibrational K.E of molecules
C. rotational K.E of molecules
D. all of them
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| 7 |
The time required to complete on vibration is called
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A. frequency
B. total time
C. time period
D. velocity
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| 8 |
How much time, theα-particle more massive than an electron
|
A. 600
B. 7000
C. 5000
D. 15000
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| 9 |
Which one of the following could be the frequency of ultraviolet radiation?
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A. 1.0 x 106Hz
B. 1.0 x 109Hz
C. 1.0 x 1012Hz
D. 1.0 x 1015Hz
|
| 10 |
Majority charge carriers in the p-region of p-n junction are:
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A. electrons
B. positrons
C. Holes
D. Neutrons
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| 11 |
In a semi-conductor material, the total current is
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A. only the +ve current
B. only the electronic current
C. sum of +ve and electronic current
D. all of them
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| 12 |
The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called
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A. Diffraction
B. Interference
C. Polarization
D. Dispersion
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| 13 |
An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be
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A. 1 MeV
B. 2 MeV
C. 4 MeV
D. 8 MeV
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| 14 |
Which of the following quantity for particle executing SHM is non-zero at mean position
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A. Force
B. Acceleration
C. Velocity
D. Displacement
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| 15 |
If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get
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A. diffraction
B. beat
C. interference
D. resonance
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| 16 |
One radian is:
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A. Greater than one degree
B. Less than one degree
C. Equal to one degree
D. None of these
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| 17 |
magnetic field is a:
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C. Scalar as well as
scalar quantity
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| 18 |
The distance from eye to near point is taken as:
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A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
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| 19 |
Inverter is the name given to:
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A. NOT gate
B. OR gate
C. NOR gate
D. AND gate
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| 20 |
In the case of an incompressible fluid in stead flow the net rate of flow of mass entering one end of the tube of flow is equal to the net rate of flow of mass leaving the other end. This equation is called
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A. Quadratic equation
B. Equation of discontinuity
C. Equation of continuity
D. None of the above
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| 21 |
If the waves produced in a microwave oven are of wave-length 12 cm, then their frequency will be:
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A. 2500 MHz
B. 0.25 MHz
C. 2500 KHz
D. None of these
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| 22 |
A prism splits a beam of white light into seven component colors. This is so because
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A. Phase of different colors is different
B. Amplitude of different colors is different
C. Wavelength of different colors is different
D. Velocity of different colors is different
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| 23 |
In gases, the charge carries are:
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| 24 |
The unit of flux density is also given by
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A. Weber/m2or Wb . m-2
B. Weber/mor Wb . m
C. Weber/mor Wb . m-1
D. Weber or Wb
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| 25 |
The total charge of any nucleus is given as
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A. Ze2
B. Z2e
C. Z/e
D. Ze
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| 26 |
The vector in space has:
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A. One component
B. Two components
C. Three components
D. None of these
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| 27 |
A point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is:
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A. 0.05 m
B. 0.08 m
C. 0.8 m
D. 0.008 m
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| 28 |
The sum of positive and negative peak values are usually written as
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A. P-P value
B. negative
C. zero
D. may be positive or negative
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| 29 |
Current varies with voltage
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A. Inversely
B. as square root
C. Directly
D. None of these
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| 30 |
A ball is thrown upwards with a velocity of 100 m/s. It will reach the ground after
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A. 10 s
B. 20 s
C. 5 s
D. 40 s
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