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Home⇒ Everyday Science GK⇒ Physics
Note:- You can add tough questions into your favourite list for second revision. |
Q1 ⇒ Let a thin capillary tube be replaced with another tube of insufficient length then, we find water will not rise [other wrong options] [Discuss in forum] will overflow depressed change its meniscus |
Q2 ⇒ Light year is a unit of distance [other wrong options] [Discuss in forum] time light intensity of light |
Q3 ⇒ Radio telescopes are better than optical telescopes because All of the above [other wrong options] [Discuss in forum] they can detect faint galaxies which no optical telescope can they can work even in cloudy conditions they can work during the day and night |
Q4 ⇒ Rainbow is due to refraction and reflection of sunlight by water droplets [other wrong options] [Discuss in forum] absorption of sunlight in minute water droplets diffusion of sunlight through water droplets ionisation of water deposits |
Q5 ⇒ Sound travels with a different speed in media. In what order does the velocity of sound increase in these media? Air, water and iron [other wrong options] [Discuss in forum] Water, iron and air Iron, air and water Iron, water and air |
Q6 ⇒ Large astronomical telescopes always use as objective combinations of lenses [other wrong options] [Discuss in forum] lens mirror None of the above |
Q7 ⇒ Sound of frequency below 20 Hz is called infrasonic [other wrong options] [Discuss in forum] audio sounds ultrasonic supersonics |
Q8 ⇒ It is more difficult to walk on a sandy road than on a concrete road because the friction between sand and feet is less than that between concrete and feet [other wrong options] [Discuss in forum] sand is soft and concreter is hard the friction between sand and feet is more than that between concrete and feet the sand is grainy but concrete is smooth |
Q9 ⇒ Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension? Impulse and moment of force [other wrong options] [Discuss in forum] Pressure and Young's modules Planck's constant and Angular momentum Force and rate of change of linear momentum |
Q10 ⇒ Stars which appear single to the naked eye but are double when seen through a telescope are binaries [other wrong options] [Discuss in forum] novas and supernovas asteroids quasars |
Q11 ⇒ Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit visible light [other wrong options] [Discuss in forum] X-rays ultraviolet light radio waves |
Q12 ⇒ One thousand microns is equal to 10-3m [other wrong options] [Discuss in forum] 10-6m 10-9m 10-12m |
Q13 ⇒ Mirage is due to unequal heating of different parts of the atmosphere [other wrong options] [Discuss in forum] magnetic disturbances in the atmosphere depletion of ozone layer in the atmosphere equal heating of different parts of the atmosphere |
Q14 ⇒ One should not connect a number of electrical appliances to the same power socket because this can damage the domestic wiring due to overloading [other wrong options] [Discuss in forum] this can damage the appliances due to overloading this can damage the electrical meter the appliance will not get full voltage |
Q15 ⇒ On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because cohesion of mercury is greater than its adhesion with glass [other wrong options] [Discuss in forum] mercury is a metal density of mercury is greater than that of water cohesion of water is greater than its adhesion with glass |
Q16 ⇒ Radiocarbon is produced in the atmosphere as a result of collision between fast neutrons and nitrogen nuclei present in the atmosphere [other wrong options] [Discuss in forum] action of ultraviolet light from the sun on atmospheric oxygen action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere lightning discharge in atmosphere |
Q17 ⇒ Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2 14 m/s [other wrong options] [Discuss in forum] 0.14 m/s 140 m/s 1.4 km/s |
Q18 ⇒ MLTis the dimensional formula for couple acting on a body [other wrong options] [Discuss in forum] moment of inertia pressure elasticity |
Q19 ⇒ Out of the following pairs, which one does not have identical dimension? Moment of inertia and moment of a force [other wrong options] [Discuss in forum] Work and Torque Angular momentum and Planck's constant Impulse and Momentum |
Q20 ⇒ 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 momentum [other wrong options] [Discuss in forum] velocity acceleration kinetic energy |
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