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Physics General Science Test Medium Mode MCQs With Answers
Question # 1
The electrode connected with the positive terminal of the current source is called
Choose an answer
cathode
anode
electrolyte
position
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Question # 2
For the normal operation of the transistor, its
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emitter-base and collector base junctions are forward biased
emitter-base junction is reversed biased and collector base junction is forward biased
emitter-base junction is forward biased and collector-base junction is reverse biased
any one of these
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Question # 3
In a three phase a.c. generator, there are
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2 coils
3 coils
1 coild
No coil
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Question # 4
The magnifier forms a virtual image of the object at:
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Least distance of distinct vision
Much farther than the least distance
Both A and B are correct
None of these
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Question # 5
The He-Ne laser discharge tube is filled with:
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85% He
15% He
50% He
60% He
85% Ne
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Question # 6
Direction of motion_______ in circular of motion:
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Changes off and on
Changes continuously
Does not change
None of them
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Question # 7
The threshold frequency of sodium is 6 x 10
6
MHz. The cut-off wavelength for this metal will be
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500 m
500 nm
500 km
500 cm
None of these
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Question # 8
A mass of 5kg moves with an acceleration of 10m s
-2
force applied is
Choose an answer
10
N
50
N
2
N
20
N
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Question # 9
A potential barrier of 0.7 V exists across p-n junction made from:
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Germanium
Silicon
Arsenic
Gallium
Indium
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Question # 10
Avo-meter is used of measure the
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current, voltage
voltage, resistance
resistance, current
current, voltage and resistance
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Question # 11
X-ray are also known as
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Roentgen rays
Maxwell rays
Plank range
Einstein rays
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Question # 12
The moment of linear momentum of a body is called
Choose an answer
Angular momentum
Couple
Impulse
Torque
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Question # 13
With a step-index fibre, the overall time difference between all the wavelengths arrived at the other end may be about
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43 s per km
33 s per km
1 ns per km
33 ns per km
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Question # 14
Semiconductor materials have the conductivities generally lies between
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10
-5
to 10
-6
(Ωm)
-1
10
-6
to 10
-4
(Ωm)
-1
10
-7
to 10
-3
(Ωm)
-1
None of these
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Question # 15
Linear momentum is a
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fixed quantity
constant quantity
scalar quantity
vector quantity
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Question # 16
The fractional change in volume per unit increase is pressure in called:
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Pressure coefficient
Volume coefficient
Bulk modulus
Compressibitlity
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Question # 17
The viscosity of liquid is due to
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Adhesive force
Cohesive force
Gravitational force
Diffusion
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Question # 18
The idea that all magnetic effects may be due to circulating currents (i.e moving charges) Was first held by
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Ampere
Faraday
Lenz
Gauss
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Question # 19
If the tension in a string stretched between two fixed points is made four times, the frequency of the fundamental harmonic will become:
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Two times
Three times
Four times
Six times
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Question # 20
If both the length and radius of rod are doubled, then the modulus of elasticity will:
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Increase
Decrease
Remains the same
Doubled
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Question # 21
Single mode step index fibre has a very thin core of about diameter
Choose an answer
5.5 μm
9.5 μm
5.0 μm
All of these
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Question # 22
Which one of the following waves cannot be polarized
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Radio waves
X-rays
Transverse waves in a string
Longitudinal waves in a gas
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