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Physics General Science Test Medium Mode MCQs With Answers
Question # 1
The distance covered by the wave during one period is called its:
Choose an answer
Wave number
Frequency
Wavelength
Time period
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Question # 2
A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is
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minimum
maximum
zero
none of these
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Question # 3
Which of the following is not a unit of power:
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J-sec
Watt
N m/sec
Horsepower
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Question # 4
In radio-active decay, the original element which disintegrate to another element is called
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element
daughter element
parent element
none of these
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Question # 5
Diameter of the atom is of the order of
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10
-10
m
10
-12
m
10
-15
m
10
-9
m
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Question # 6
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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Diffraction
Interference
Polarization
Dispersion
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Question # 7
Back emf is produced due to
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Self induction
Mutual induction
A.C
Lenz's law
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Question # 8
When force and displacement are perpendicular to each other than work is equal to
Choose an answer
Unity
Infinity
Zero
-Fd
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Question # 9
The materials in which valence electrons are bound very tightly to their atoms and are not free, are known as
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conductors
insulators
semi-conductors
all of them
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Question # 10
A potential barrier of 0.7V exists across p-n junction made from:
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Germanium
Silicon
Arsenic
Gallium
Indium
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Question # 11
An electron is accelerated through a potential difference of 50v. its de-Brogile wavelength is
Choose an answer
1.66 x 10
-29
m
1.74 x 10
-10
cm
17.4 x 10
-6
m
1.74 x 10
-10
m
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Question # 12
A substance containing equal no. of opposite charges separated by a small distance is known as
Choose an answer
Super conductor
LED
Dipole
Insulator
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Question # 13
Two equal, antiparallel and non-collinear forces are called
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Net force
Couple
Torque
None of these
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Question # 14
With a graded index fibre, the overall time difference between all the wavelengths arrived at the other end may be about
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1 ns per km
10 ns per km
43 s per km
33 ns per km
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Question # 15
The plane of polarization is rotated many degrees when a thickness of such crystal is
Choose an answer
One millimeter
Less than one millimeter
A few millimeter
None of these
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Question # 16
In everyday life, when two balls collide then after collision, they the velocities as before the
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greater than the velocities as before the impact
equal to the velocities as before the impact
less than the velocities as before the impact
none of them
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Question # 17
The body moving with uniform velocity may be
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in equilibrium
accelerating
changing in direction
changing in magnitude
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Question # 18
Work done is expanding gas under adiabatic condition results
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Increase in temperature
Decrease in temperature
No change in temperature
None of these
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Question # 19
The torque will be zero if the angle between r and F is
Choose an answer
zero
30
°
45
°
90
°
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Question # 20
A cell of negligible resistance and e.m.f 2 V is connected across a series combination of 2,3 and 5 ohms. The p.d. across the 3 Ω resistor is
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0.6 V
1/3 V
2/3 V
4/3 V
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Question # 21
Which of them is not a physical quantity
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Density
Impulse
Energy
Kilogram
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Question # 22
For a given angle of projection if the time of flight of a projectile is doubled the horizontal range will increases to:
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Four times
Thrice
Once
Twice
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