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Free download in PDF Physical Science Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
Mirage is due to
[A]
unequal heating of different parts of the atmosphere
[B]
magnetic disturbances in the atmosphere
[C]
depletion of ozone layer in the atmosphere
[D]
equal heating of different parts of the atmosphere
Answer: unequal heating of different parts of the atmosphere
(2)
Natural radioactivity was discovered by
[A]
Marie Curie
[B]
Ernest Rutherfor
[C]
Henri Becquerel
[D]
Enrico Fermi
(3)
It is more difficult to walk on a sandy road than on a concrete road because
[A]
sand is soft and concreter is hard
[B]
the friction between sand and feet is less than that between concrete and feet
[C]
the friction between sand and feet is more than that between concrete and feet
[D]
the sand is grainy but concrete is smooth
Answer: the friction between sand and feet is less than that between concrete and feet
(4)
One should not connect a number of electrical appliances to the same power socket because
[A]
this can damage the appliances due to overloading
[B]
this can damage the domestic wiring due to overloading
[C]
this can damage the electrical meter
[D]
the appliance will not get full voltage
Answer: this can damage the domestic wiring due to overloading
(5)
Light travels at the fastest speed in
[A]
glass
[B]
water
[C]
hydrogen
[D]
vacuum
(6)
Of the following properties of a wave, the one that is independent of the other is its
[A]
amplitude
[B]
velocity
[C]
wavelength
[D]
frequency
(7)
Who discovered Atom ?
[A]
Madam Curie
[B]
James Chadwick
[C]
Rutherford
[D]
John Dalton
(8)
Device used to measure potential difference between two points in a circuit is ?
[A]
Ammeter
[B]
Galvanometer
[C]
Voltmeter
[D]
None of above
(9)
Who discovered Diode Bulb ?
[A]
Henry Becquerel
[B]
Sir J.S. Fleming
[C]
Lee De Forest
[D]
Archemedes
(10)
Which unit we use to express Nuclear sizes ?
[A]
Tesla
[B]
Newton
[C]
Fermi
[D]
None of the above
(11)
The absorption of ink by blotting paper involves
[A]
capillary action phenomenon
[B]
viscosity of ink
[C]
siphon action
[D]
diffusion of ink through the blotting
Answer: capillary action phenomenon
(12)
Which instrument is used to measure altitudes in aircraft’s ?
[A]
Audiometer
[B]
Ammeter
[C]
Altimeter
[D]
Anemometer
(13)
Which one of the following has the highest value of specific heat ?
[A]
Alcohol
[B]
Methane
[C]
Kerosene
[D]
Water
(14)
Which law is also called the law of inertia ?
[A]
Newton’s first law
[B]
Newton’s Second Law
[C]
Newton’s Third Law
[D]
All of these
Answer: Newton’s first law
(15)
If electrical conductivity increases with the increase of temperature of a substance, then it is a:
[A]
Conductor
[B]
Semiconductor
[C]
Insulator
[D]
Carborator
(16)
Magnetism at the centre of a bar magnet is
[A]
minimum
[B]
maximum
[C]
zero
[D]
minimum or maximum
(17)
Light from the Sun reaches us in nearly
[A]
2 minutes
[B]
4 minutes
[C]
8 minutes
[D]
16 minutes
(18)
Planets are
[A]
luminous heavenly bodies revolving around a star
[B]
non-luminous heavenly bodies
[C]
luminous heavenly bodies that twinkle
[D]
luminous heavenly bodies that do not twinkle
Answer: non-luminous heavenly bodies
(19)
Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons?
[A]
1.8 km, 0.15 km
[B]
2.2 km, 0.20 km
[C]
2.8 km, 0.25 km
[D]
3.3 km, 0.30 km
(20)
Sound waves in air are
[A]
transverse
[B]
longitudinal
[C]
electromagnetic
[D]
polarized
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