Top 1000+ Solved Physics MCQ Questions Answer
Q. This scientist gave the law- ‘Properties of elements are a periodic function of their atomic number.’ This property of the fundamental importance of atomic number was discovered by-
a. Johann Wolfgang Döbereiner
b. John Newlands
c. Dmitri lvanovich Mendeléev
d. Henry Moseley
Q. A spherical ball made of steel when dropped in mercury container will –
a. sink in mercury
b. will be on the surface of mercury
c. will be partly immersed mercury
d. will dissolve in mercury
Q. The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as –
a. Audible sounds
b. Ultrasonics
c. Infrasonics
d. Megasonics
Q. In the absence of ozone layer, Which rays will enter into atmosphere?
a. Infrared
b. Visible
c. Ultraviolet
d. X-rays
Q. An object at rest will remain at rest and an object in motion will remain in motion until and unless it is acted upon by an external force. This is Newton's –
a. First law
b. Second law
c. Third law
d. Fourth law
Q. The mirror used for the head light of a car is –
a. spherical concave
b. plane
c. cylindrical
d. parabolic concave
Q. Knot is a measure of –
a. Unit of speed
b. the curvature of spherical objects
c. solar radiation
d. intensiry of earthquake shock
Q. How much mechanical work must be done to completely melt 1 gram of ice at 0°C?
a. 4.2 J
b. 80 J
c. 336 J
d. 2268 J
Q. A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is –
a. zero
b. one
c. less than one
d. more than one
Q. At low temperature, Lead behaves as a
a. Semi conductor
b. Super conductor
c. Insulator
d. Conductor
Q. At what temperature are the temperature on Celsius and Fahrenheit scales equal?
a. 273° Celsius
b. -273° Celsius
c. -40° Celsius
d. 40° Celsius