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Question:- 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:- Option A
Question:- Light from the Sun reaches us in nearly A. 2 minutes B. 4 minutes C. 8 minutes D. 16 minutes
Answer:- Option C
Question:- Stars appears to move from east to west because A. all stars move from east to west B. the earth rotates from west to east C. the earth rotates from east to west D. the background of the stars moves from west to east
Answer:- Option B
Question:- Pa(Pascal) is the unit for A. thrust B. pressure C. frequency D. conductivity
Answer:- Option B
Question:- Planets do not twinkle because A. they emit light of a constant intensity B. their distance from the earth does not change with time C. they are very far away from the earth resulting in decrease in intensity of light D. they are nearer to earth and hence we receive a greater amount of light and, therefore minor variations in the intensity are not noticeable
Answer:- Option D
Question:- Metals are good conductors of electricity because A. they contain free electrons B. the atoms are lightly packed C. they have high melting point D. All of the above
Answer:- Option A
Question:- Let a thin capillary tube be replaced with another tube of insufficient length then, we find water A. will overflow B. will not rise C. depressed D. change its meniscus
Answer:- Option B
Question:- If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same A. velocity B. momentum C. acceleration D. kinetic energy
Answer:- Option B
Question:- Pick out the scalar quantity A. force B. pressure C. velocity D. acceleration
Answer:- Option B
Question:- Rectifiers are used to convert A. Direct current to Alternating current B. Alternating current to Direct current C. high voltage to low voltage D. low voltage to high voltage
Answer:- Option B
Question:- out of the following, which is not emitted by radioactive substance? A. Electrons B. Electromagnetic radiations C. Alpha particles D. Neutrons
Answer:- Option D
Question:- Sound waves in air are A. transverse B. longitudinal C. electromagnetic D. polarised
Answer:- Option B
Question:- Magnetism at the centre of a bar magnet is A. minimum B. maximum C. zero D. minimum or maximum
Answer:- Option C
Question:- 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:- Option B