List of 50 Important Physics Questions and answer
1). The Element of an electric heater is made of____
a) Nichrome
b) Copper
c) Aluminum
d) None of these
Answer is: a)
2).When water is heated from 0o Celsius to 100o Celsius, the volume of water
a) Increase gradually
b) Degrease gradually
c) First increase, then decrease
d) First decrease , then increase
Answer is: d)
3).One mega watt hour (MWH) is equal to
a) 3.6 × 103 joule
b) 3.6 × 104 joule
c) 3.6 × 107 joule
d) 3.6 × 109 joule
Answer is: d)
4).At what temperature are the temperature on Celsius and Fahrenheit scales equal?
a) 273o Celsius
b) - 273o Celsius
c) – 40o Celsius
d) 40o Celsius
Answer is: c)
5).The Period of revolution round the sun is maximum by which among the following
planets?
a) Mercury
b) Venus
c) Earth
d) Mars
Answer is: d)
6).Einstein got the Nobel prize for?
a) Theory of Relativity
b) Photo-electric effect
c) Polarisation
d) Radio activity
Answer is: b)
7).Galvanometer can be converted into a voltmeter by using
a) Low resistance in series
b) High resistance in series
c) Low resistance in parallel
d) High resistance in parallel
Answer is: b)
8).Gas law was given by
a) Boyle
b) Ostwald
c) Arrhenius
d) Faraday
Answer is: a)
9).Kilowatt – hour is a unit of
a) Energy
b) Power
c) Electric charge
d) Current
Answer is: b)
10).The ozone layer protects us from
a) Ultra violet rays
b) Radio waves
c) Visual radiation
d) Infrared radiation
Answer is: a)
11).What will be the temperature of the maximum if 100 gm ice at 0oC is put in 100 gm
water at 80oC? (Latent heat of ice = 80 cal / gm)
a) 35oC
b) 45oC
c) 60oC
d) 0oC
Answer is: d)
12).Fire in the diesel engine is produces by which of the following?.
a) Compression
b) Spark plug
c) Friction
d) Self starter
Answer is: a)
13).With an increase in pressure the melting point of max will.
a) Decrease
b) Increase
c) First increase and then decrease
d) Remain Unaffected
Answer is: b)
14).Which among the following is the best conductor of electricity?
a) Silver
b) Copper
c) Gold
d) Lead
Answer is: a)
15).Which among the following order of decreasing wavelengths of electromagnetic
waves is correct?
I. Radio waves II. Infrared rays III. Visible Light IV. X-Rays
a) II, I, IV, III
b) I, III, II, IV
c) I, II, III, IV
d) IV, III, II, I
Answer is: c)
16).Ampere-hour is the unit of which among the following?
a) Power
b) Energy
c) Intensity of current
d) Amount of charge
Answer is: d)
17).Who discovered X-Rays?
a) Madam Curie
b) Einstein
c) Roentgen
d) J. J. Thomson
Answer is: c)
18).Which among the following are primary colors?
a) Red, Green, Blue
b) Blue, Yellow, Green
c) Red, Magenta, Yellow
d) Yellow, Violet, Blue
Answer is: a)
19).At what temperature will the density of water be maximum?
a) 0o C
b) 32o C
c) - 4o C
d) 4o C
Answer is: d)
20).Persistence of vision is the principle behind?
a) Camera
b) spectroscope
c) Cinema
d) Periscope
Answer is: c)
21).Which metal is commonly used for making an electromagnet?
a) Copper
b) Iron
c) Nickel
d) Cobalt
Answer is: b)
22).Light from the laser is________.
a) Monochromatic
b) Composite
c) Dispersed light
d) Incoherent
Answer is: a)
23).Choke is used to_______.
a) Reduce the current in AC circuit
b) Reduce the current in DC circuit
c) Convert AC to DC
d) Convert DC to AC
Answer is: a)
24).In a standing wave the distance between a node and adjacent antinode is______.
a) 3λ / 2
b) λ / 2
c) λ / 4
d) 3λ / 4
Answer is: c)
25).A telescope and microscope differ in that______.
a) Both are different instruments
b) Telescope’s eyepiece with longer focal lengths that the oblective
c) Telescope has objective of large focal length and eyepiece of smaller
focal lengths
d) None of these
Answer is: c)
26).The weight of a body is______.
a) The same everywhere on the surface of the earth
b) Maximum at the poles
c) Maximum at the equator
d) More on the hills than in the plains
Answer is: b)
27).At what temperature a body will not radiate any heat energy?
a) 0o C
b) 273o C
c) 100o C
d) -273o C
Answer is: d)
28).Electromagnetic spectrum consists of the following radiations-
I. X-rays
II. Gamma rays
III. Ultraviolet radiations
IV. Infrared radiations
Choose the correct order of code in the increasing order of their frequency:
a) I, III, II, IV
b) II, I, III,IV
c) IV, III, I, II
d) IV, II, III, I
Answer is: c)
29).Only one part of moon can be seen from earth because____.
a) Only one part reflects light
b) It does not rotate
c) The period of rotation and revolution are equal
d) None of these
Answer is: c)
30).Parsec is a unit of_______.
a) Pressure
b) Astronomical distance
c) Time
d) Energy
Answer is: b)
31).In which among the following is alternating current not used?
a) Refrigeration
b) Heat production
c) Electroplating
d) Radio detection
Answer is: c)
32).Blisters are formed more rapidly by the steam of boiling water in comparision to
boiling water itself because ________.
a) Temperature of the stream is higher
b) Stream enters the body pores rapidly
c) Stream is a gas and rapidly covers the body
d) Stream has latent heat
Answer is: d)
33).An ice cube is floating on the surface of water: How will the water level be affected
by melting of this ice cube?
a) Water level will be raised
b) Water level will go down
c) Water level will remain the same
d) Water level will first rise up then it will go down
Answer is: c)
34).What will be the effect on gravitational acceleration if the earth suddenly stops its
rotation?
a) It will reduce at the poles
b) It will increase at the poles
c) It will decrease at the equator
d) It will increase at the equator
Answer is: b)
35).Ohmic conductor among the following is _____.
a) Transistor
b) Thermal value
c) Electrolyte
d) Constantum
Answer is: d)
36).One Kilo Calorie heat will be equal to_____.
a) 4.2 joule
b) 4.2 x 102 Joule
c) 4.2 x 103 Joule
d) 4.2 x 104 Joule
Answer is: c)
37).Ball pen works on the principle of ______.
a) Viscosity
b) Boyle’s Law
c) Gravitational force
d) Capillarity and surface tension
Answer is: d)
38).The apparatus used in submarines to give clear view of the objects on the surface
of the ocean or ground is known as________.
a) Periscope
b) sectant
c) stereoscope
d) telescope
Answer is: a)
39).Growth of the baby in the uterus is found using______.
a) X-rays
b) Gamma rays
c) Ultra sound
d) Ultra Violet rays
Answer is: c)
40).The form of matter are________.
a) 3
b) 4
c) 5
d) 7
Answer is: a)
41).The centre of the Newton’s rings pattern is dark since_______.
a) The light undergoes a phase change π
b) The glass plate plano-convex lens
c) The light undergoes a phase change 2 π
d) The light undergoes a phase change π/2
Answer is: a)
42).If a red-green flag is seen in green light it appears to be of which of the following
colour?
a) Green
b) Black
c) Black - Green
d) Red - Black
Answer is: c)
43).A moving electric charge produces__________.
a) Only electric field
b) Only Magnetic field
c) Both electric and magnetic field
d) Either electric or a magnetic field
Answer is: c)
44).Which among the following order of decreasing wavelengths of electromagnetic
waves are correct?
I. Radio waves
II. Infrared rays
III. Visible light
IV. X-rays
Choose the answer from the following code:
a) II, I, IV, III
b) I, III, II, IV
c) I, II, III, IV
d) IV, III, II, I
Answer is: c)
45).Which among the following is the surface to surface missile that is made in India?
a) Dharti
b) Akash
c) Prithivi
d) Naag
Answer is: c)
46).Lightning conductors are made up of......................
a) Iron
b) Aluminium
c) Copper
d) Steel
Answer is: c)
47).The I.C Chip used in a computer is made up of.....................
a) Silicon
b) Chromium
c) Gold
d) Lead
Answer is: a)
48).Which planet is nearest to the earth?
a) Mercury
b) Jupiter
c) Venus
d) Mars
Answer is: d)
49).Which among the following quantities is scalar?
a) Velocity
b) Acceleration
c) Work
d) Force
Answer is: a)
50).Nichrome wire is used in an electric heater because__________.
a) It has high resistance
b) It has high melting point
c) It can resist a current upto approx 5 amperes
d) For all of the above reasons
Answer is: d)
No comments:
Post a Comment
Thanks for giving a valuable feedback.
have a great day.
from-prarocks