Physics : General Knowledge Questions and Answers

Q91. The information of brilliant colors in a thin soap film is a consequence of the phenomena of

[A] Multiple reflection and interference

[B] Multiple refraction and dispersion

[C] Polarization and interference

[D] Diffraction and dispersion

Q92. Which is the point from where an azimuth originates?

[A] North

[B] West

[C] East

[D] South

Q93. A standing wave occurs when

[A] the speed of the wave is zero or near zero

[B] a wave reflects upon itself

[C] the amplitude of a wave exceeds its wavelength

[D] two waves overlap

Q94. Atmospheric pressure exerted on earth is due to

[A] rotation of earth

[B] gravitational pull

[C] uneven heating of earth

[D] revolution of earth

Q95. Which of the following has the highest frequency?

[A] Radio waves

[B] Cosmic rays

[C] Microwaves

[D] X-rays

Q96. One astronomical unit is the average distance between

[A] Jupiter and the Sun

[B] Pluto and the Sun

[C] Earth and the Sun

[D] Earth and the Moon

Q97. The ___________ is responsible for Earth’s magnetic field.

[A] outer core

[B] crust

[C] inner core

[D] mantle

Q98. A man jumping out of a moving train is thrown 

[A] sideways

[B] forward

[C] backward

[D] None of these

Q99. Sound waves cannot travel in

[A] Water

[B] Glass

[C] Hydrogen gas

[D] Vacuum

Q100. Which of the following lies on the reflecting surface of the minor?

[A] Pole

[B] Focal length

[C] Focus

[D] Centre of curvature