MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
General Knowledge
Physics
Quiz 17
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Q.1
Which of the following is used for regulated electric supply ?
Zener diode
Junction diode
Gun diode
Tunnel diode
Q.2
In electronics what comes under tank circuit ?
Resistance and capacity
Resistance and inductance
Capacity and inductance
Resistance, capacity and inductance
Q.3
A soap bubble shows colours when illuminated with white light. This is due to
Diffraction
Polarisation
Interference
Reflection
Q.4
Universal gates are
AND and OR
OR and NOT
NAND and NOR
AND and XOR
Q.5
Which one among the following components is used as an amplifying device?
Transformer
Diode
Capacitor
Transistor
Q.6
An integrated circuit is more advantages than a coventional circuit because
They make the electric equipments more reliable and easier for servicing
A faulty part of a conventional circuit may be difficult to locate and repair
If a part of the integrated circuit fails the entire circuit is simply replaced
All the above
Q.7
A NOT gate can be implemented by:
A single diode
Two diodes
A single resistor
A single transistor
Q.8
Which of the following waves cannot be polarised?
Radio
Ultra violet
Infrared
Ultrasonic
Q.9
Which of the following features of a tunnel diode is its drawback?
Extremely high frequency response
Very wide temperature range of operations
Instability due to negative resistance
Very low power consumptions
Q.10
The plastic material commonly used for making gear wheels is
Polyesters
Nylons
Bakelit
Polystyrene
Q.11
A fresh egg when placed in salt water will
Sink and go to the bottom
Sink but will not go to the bottom
Float
Burst
Q.12
Burns caused by steam are much severe than those caused by boiling water because
Steam pierces through the pores of body quickly
Steam has latent heat
Steam is gas and engulfs the body quickly
Temperature of steam is higher
Q.13
Which of the following has got more heat capacity ?
Iron piece
Water
Gold piece
Benzene
Q.14
What is the reason for twinkling of stars ?
Dispersion of light
Total internal reflection
Atmospheric reflection
Atmospheric refraction
Q.15
The bats can fly in the dark because
They can see the objects in darkness
They have weak legs and are likely to be attacked by predators
They generate flashes of light
They generate ultrasonic sound waves
Q.16
Which of the following produces more severe burns ?
Boiling water
Hot water
Steam
Melting iceberg
Q.17
Which elements are malleable and good conductors of electricity?
Tin and silver
Iodine and silver
Tin and xenon
Iodine and xenon
Q.18
The basic reason for the extraordinary sparkle of suitably cut diamond is that
It has well defined cleavage planes
It has a very high transparency
It has a very high refractive index
It is very hard
Q.19
The device used for locating submerged objects under sea is.
Sonar
Radar
Laser
Maser
Q.20
Heat stored in water vapour is
Specific heat
Latent heat
Absolute heat
Relative heat
Q.21
Which of the following colour of light deviates least through the prism?
Yellow
Green
Violet
Red
Q.22
When a body falls from an aeroplane, there is increase in its
Kinetic energy
Mass
Acceleration
Potential energy
Q.23
Water cannot be used to extinguish fire caused by electric current, because
It may cause electrocution
It may cause hydrolysis
It may cause electrolysis
It may spoil the wiring
Q.24
Find the resistance (in mega) of a wire of length 20m, cross sectional area 1 cm
2
and made of a material of resistivity 200m.
40
4000
80
2000
Q.25
The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as
Audible sounds
Ultrasonics
Infrasonics
Megasonics
Q.26
In mirrors the back surface is coated with a thin layer of :
Mercury
Silver
Red oxide
Silver nitrate
Q.27
The energy emitted by the Sun is due to
Chemical reaction
Nuclear fission
Nuclear fusion
All of the above
Q.28
Which of these is not a simple machine?
A pair of scissors
A lever
A ramp
The pulley
Q.29
Optical fibre works on which of the following principle of light?
Reflection
Refraction
Diffraction
Total internal reflection
Q.30
If electric resistance is to be decreased, then the number of resistances should be connected in ________
Series
Parallel
Mixed arrangement
None of these
Q.31
Ampere second could be the unit of
Power
Energy
Conductance
Charge
Q.32
Bending of light rays in denser medium is termed as:
Reflection
Dispersion
Refraction
Deflection
Q.33
Which of the following never occurs singly in nature?
Inertia
Momentum
Force
Velocity
Q.34
The moment of inertia of a body does not depend upon
The mass of the body
The mass distribution in the body
The angular speed of the body
The axis of rotation of the body
Q.35
Brightness of bulb depends on voltage or current?
Current
Voltage
Both A & B
None
Q.36
A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be
5 R
5 R/4
4 R/5
R/5
Q.37
A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair suffers.
Reflection
Refraction
Diffraction
Total internal reflection
Q.38
Where does hydroelectric energy come from?
Air
Water
Solar
All of the above
Q.39
Which colour has the highest energy?
Violet
Red
Blue
White
Q.40
Which colour of light shows maximum deviation when passed through a prism ?
White
Red
Violet
Green
Q.41
Which one of the following is a good electrical conductor?
Graphite
Diamond
Peat
Charcoal
Q.42
Which of the following is not a form of Energy?
Heat
Sound
Motion
Pressure
Q.43
Newton's first law of motion gives the concept of
Energy
Work
Momentum
Inertia
Q.44
The resistance of a conductor is inversely proportional to its:
Length
Resistivity
Temperature
Area of cross section
Q.45
Which one of the following is an ohmic conductor?
Germanium
Silicon
Carbon
Silver
Q.46
Which of the following is a good conductor of heat but a bad conductor of electricity ?
Celluloid
Rubber
Asbestos
Mica
Q.47
Red is used as an emergency or danger signal as
It is a striking colour
Its wavelength is the longest
It is scattered
It has very high energy
Q.48
The source of the Sun's energy is the process of
Photoelectric emission
Nuclear fission
Nuclear fusion
Thermionic emission
Q.49
The reason for a swimming pool to appear less deep than the actual depth is
Refraction
Light scattering
Reflection
Interference
Q.50
The sparkling of a diamond is due to
Total internal reflection of light
Interference of light
Polarisation of light
Refraction of light
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page