National Science Day Quiz Preliminary Round

What is the energy mass relation?

• E=m c

The photoelectric effect was theoretically explained by

• Niels Bohr

• Max Planck

• Albert Einstein

• Werner Heisenberg

The thermoelectric effect was discovered by

• Thomas Seebeck

• Albert von Ettingshausen

• Walther Nernst

• Lord Kelvin

The shape of our milky way galaxy is

• circular

• elliptic

• spiral

• parabolic

Who among the following is credited for the discovery of ‘Expanding Universe’?

• Edwin Hubble

• S Chandra Shekhar

• Niels Bohr

• C.V Raman

Longitudinal waves cannot travel through

• Vaccum

• Solid

• Liquid

• Gas

If the length of a simple pendulum is halved, then the period of oscillation is

• Halved

• Doubled

• decreased by a factor of √2

• increased by a factor of √2

The different colors of different stars are due to

• Temperature

• Pressure

• Density

• Radiation from them

Doping of Semiconductors

• materials which can conduct electricity better than insulator, but not as well as conductors.

• when 4 electrons in outermost orbit.

• The process of adding of a certain amount of specific impurities atoms in the pure semiconductor.

• None of the above