| 1 |
The arrangement or molecules or atoms in a crystalline solid can be studied by using:
|
A. Chemical methods
B. Neutrons
C.X-ray techniques
D. Copper atoms
|
| 2 |
Phenomenon of radioactivity is due to disintegration of
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A. nucleus
B. neutron
C.proton
D. molecule
|
| 3 |
The mass of a body measured by a physical balance in a lift at rest is found to be m, if the lift is going up with an acceleration a, its mass will be measured as
|
A. m (1 - a/g)
B. m (1 + a/g)
C.m
D. Zero
|
| 4 |
Conversion of A.C. into D.C. is called:
|
A. Reftification
B. Amplification
C.Electric induction
D. Magnetic induction
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| 5 |
Spectrum represents the number of component colours present in certain light in terms of:
|
A. Wavelength
B. Frequency
C.Energy
D. Both (A) and (B)
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| 6 |
The current sensitivity of the galvanometer is
|
A. C/BAN
B. BAN/C
C.CAN/B
D. CBN/A
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| 7 |
The total reactance of a series RLC circuit at resonance is
|
A. zero
B. Equal to the resistance
C.Infinity
D. Capacitive
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| 8 |
If the distance of separation between two chares is increased, the electrical potential energy of the system will
|
A. Increase
B. Decrease
C.May increase or decrease
D. Remain the same
|
| 9 |
The passage of current is accompanied by a
magnetic field in the surrounding space:
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A. Always
accompanied
B. Sometimes accompanied
C. Never accompanied
D. Any of above
|
| 10 |
To convert galvanometer into ammeter we connect
|
A. small resistance in parallel with galvanometer
B. small resistance in series with galvanometer
C.high resistance in series with galvanometer
D. high resistance in parallel with galvanometer
|
| 11 |
Newton's first law is also called:
|
A. Law of torque
B. Law of force
C.Law of inertia
D. None of these
|
| 12 |
When brakes are applied to a fast moving car, the passenger will be thrown:
|
A. Forward
B. Backward
C.Downward
D. none of these
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| 13 |
Which of the following diodes can operate in the reverse biased condition
|
A. photo diode
B. light emitting diode
C.photo voltaic cell
D. none of these
|
| 14 |
Neutron was discovered by
|
A. Curie
B. Roentgen
C.Chadwick
D. Rutherford
|
| 15 |
Significant figures in 0.0010 are:
|
A. Four
B. Three
C.Two
D. One
|
| 16 |
In a voltmeter the conduction takes place due to
|
A. Electrons only
B. Holes only
C.Electrons and holes
D. Electrons and ions
|
| 17 |
When a fluid is in motion, its flow can be considered as
|
A. turbulent
B. streamline
C.either or them
D. neither of them
|
| 18 |
Peak value of alternative current is:
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A. one of its Instantaneous value
B. Equal to its RMS value
C.The same as its peak-to-peak value
D. Both (B) and (C)
|
| 19 |
In L.C.R series A.C. circuit, the phase angle between current and voltage is
|
A. Any angle between 0 and +π/2
B. π/2
C.π
D. Any angle between 0 andπ/2
|
| 20 |
On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands
|
A. adiabatically
B. isothermally
C.isochorically
D. isobarically
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| 21 |
In velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is
|
A. 8
B. 4
C.6
D. 7
|
| 22 |
The concept of entropy was introduced into the study of thermodynamics in
|
A. 1856
B. 1865
C.1656
D. 1685
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| 23 |
When heat is removed from the system
|
A. negative
B. positive
C.zero
D. any one of them
|
| 24 |
When two progressive waves of nearly same frequencies superimpose and give rise to beats, then
|
A. Frequency of beat changes with time
B. Frequency of beat changes with location of observer
C.All particles of medium vibrate simple harmonically with frequency equal to the difference between frequencies of component waves
D. Amplitude of vibration of particles at any point changes simple harmonically with frequency equal to difference between two component waves
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| 25 |
Which of the following options correctly states the equation of continuity for an ideal fluid?
|
A. A1A2= V1V2
B. A1/A2= V2/V1
C.A1/A2= V1/V2
D. none of the above
|
| 26 |
Electric field lines emerge from the charges in
|
A. One dimension
B. Two dimensions
C.Three dimensions
D. Four dimensions
|
| 27 |
Suppose the water flows out from a pipe at 3kg s-1and its velocity changes from 5m s-1to zero on striking the wall, then the force exerted by water on wall will be
|
A. 5 N
B. 10 N
C.15 N
D. 20 N
|
| 28 |
When body moves with increasing acceleration, its velocity time graph is a
|
A. straight line
B. horizontal straight line
C.vertical straight line
D. curve
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| 29 |
Where the streamlines are very close to each other, the pressure will be
|
A. low
B. zero
C.high
D. all of them
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| 30 |
In gases, the charge carriers are:
|
A. Electrons
B. Positive ions
C.Negative ions
D. Both A and C
|