General Science QUESTIONS AND ANSWERS

General Knowledge : General Science QUESTIONS AND ANSWERS :: part25 : 21 to 25

Following General Knowledge Multiple choice objective type questions and answers will help you in TRB, SSC and UPSC 2014 examinations :

21.Copper wires are generally used for electrical power transmission instead of iron wires because :

copper is a better conductor than iron

copper is cheaper than iron

copper can take higher power than iron

copper is lighter than iron

22.Which law is involved in the act of cleaning a carpet by beating it with a stick ?

First law of motion

Second law of motion

Law of conservation of energy

Law of conservation of mass

23.An electric motor runs on which principle ?

Electrical energy can be converted into chemical energy in the presence of magnetic fields

a conductor carrying current in the direction perpendicular to the external magnetic field feels a force

The current flowing through a conductor causes generation of heat that drives the engine

Changing magnetic field induces an electromotive force in a conductor

24.In a cup, tea cools from 90 degree C to 80 degree C in exactly one minute. It will cool from 70 degree C to 60 degree C in :

less than one minute

exactly one minute

nearly one minute

more than one minute

25.Who was conferred with the Bob Hope Humanitarian Award at the Emmy Awards of the Academy of Television Arts and Sciences recently?

Tom Cruise

Julia Roberts

George Clooney

Sean Penn

More General Science QUESTIONS AND ANSWERS available in next pages

Health is the greatest gift, contentment is the greatest wealth -Buddha

Opportunity is missed by most people because it is dressed in overalls and looks like work.- Thomas Edison

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