Q. Which of the following does not require a medium?
1) Radiation
2) Convection
3) Conduction
4) None of these
Q. For every action there is an equal and opposite reaction. This law was given by -
1) Newton
2) Albert Einstein
3) Bohr
4) Handane
Q. Harnessing of nuclear energy often causes -
1) Air Pollution
2) Water Pollution
3) Thermal Pollution
4) Noise Pollution
Q. Stainless Steel is an alloy in which following is added along with iron?
1) Zinc
2) Chromium
3) Tin
4) Copper
Q. Loudness of sound is measured in terms of following -
1) Frequency
2) Amplitude
3) Velocity
4) Wavelength
Q. When a ray of light travels from a denser medium to a rarer medium then -
1) It speeds up and bends away from the normal.
2) It speeds up and bends towards the normal.
3) It slows down and bends away from the normal.
4) It slows down and bends towards the normal.
Q. The basic difference between an AC generator and a DC generator is that -
1) AC generator has an electromagnet while a DC generator has permanent magnet.
2) AC generator has slip rings while the DC generator has a commutator.
3) DC generator will generate a higher voltage.
4) AC generator will generate a higher voltage.
Q. Why are dewdrops not formed on a cloudy night?
1) Clouds absorb the radiation released from the Earth's surface.
2) Clouds reflect back the Earth's radiation
3) The Earth's surface would have low temperature on cloudy nights
4) Clouds deflect the blowing wind to ground level
Q. Which of the following law states that Under Elastic limit, stress is directly proportional to strain?
1) Stefan's Law
2) Hooke's Law
3) Newton's Law
4) Kirchoff's Law
Q. Who is credited with the discovery of the Law of Electrical Resistance?
1) G. S. Ohm
2) Michael Faraday
3) Coulomb
4) Marconi
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