Practice General science Common Questions and Answers
- Alternating current is converted into direct current by a –
- Which among the following is the fundamental quantity?
- If the phase difference between two points is 120° for a wave with velocity of 360 m/ and frequency 500 Hz, then path difference between the two points is...
- If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this?
- The force which opposes the relative motion between different layers of liquid or gases is called –
- Who among the following developed the technology of under-ground nuclear explosion?
- A man inside an artificial satellite feels weightlessness because the force of attraction due to earth is –
- With the increase of pressure, the boiling point of any substance –
- A bottle of sodalime is grasped by the neck and swung briskly in a vertical circle, Near which portion of the bottle do the bubbles collect?
- When a detergent is added to pure water, its surface tension –
- The final image in a simple microscope is –
- A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments –
- Speed of sound in air is unaffected by change in :
- Who defined the law of gravitation?
- What principle/law explains the working of the hydraulic brakes in automobiles?
- The substance which conducts current in the solid state is –
- The surface temperature of the Sun is nearly -
- According to the theory of relativity, which of the following al-ways remains constant?
- Electrostatic precipitator is used to control —
- Metals are good conductors of electricity because –
- The absolute zero is a temperature at which -
- An aircraft can perform aerobatic manoeuvres in a vertical loop because of-
- To measure the speed of an approaching car a police officer shines –
- Lakes freeze in cold countries in winter, leaving the water underneath at –
- Which of the following is most elastic?
- The instrument used to measure the speed of the wind is –
- Light from the Sun reaches us in nearly
- A concave lens always forms an image which is –
- One can distinguish a telescope from a microscope by observing –
- In a nuclear reactor, one of the following is used as a fuel.
- Suns heat reaches us by –
- A colour-blind person cannot –
- 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 -
- If a metal can be drawn into wires relatively easily it is called:
- At what temperature a body will not radiate any heat energy?
- Stereo was invented by .
- The density of the liquid when heated
- Electrostatic precipitator is used to control the pollution of –
- The device which converts AC to DC is
- The radiation initially produced in fluorescent tube is –
