Find real questions from previous competitive exam papers with answers and solutions.
Browse complete papersWhy it is always easier to move a heavy object on rollers rather than to slide it?
Gravitational force is stronger for sliding objects
The air resistance is weaker when a heavy object is rolled
Rolling friction is always less than the sliding friction
None of the above
Correct answer
Gravitational force is stronger for sliding objects
Who of the following postulated that mass can be converted into energy and energy be converted into mass?
Newton
Einstein
Kepler
Heisenberg
Correct answer
Newton
What is the value of "g" at surface of earth (acceleration due to gravity)?
9 m/sec sq
9.8 m/sec sq
10 m/sec sq
Can't be determined
Correct answer
9 m/sec sq
Which among the following is a negatively charged particle?
Neutron
Positron
Boson
Electron
Correct answer
Neutron
Fuse wire in a circuit has
Low resistance and low melting point
High resistance and high melting point
High resistance and low melting point
Low resistance and high melting point
Correct answer
Low resistance and low melting point
X-Rays were discovered by
Rontgen
Edison
Einstein
Newton
Correct answer
Rontgen
Which of the following is used to measure the age of earth and old civilizations in archaeology?
Carbon Plating
Carbon Dating
Carbon Decay
Hydrocarbon analysis
Correct answer
Carbon Plating
Which of the following is used to measure humidity in air?
Hydrometer
Humidifier
Hygrometer
Manometer
Correct answer
Hydrometer
A sliced apple, when exposed to air, turns brown after some time as it contains?
Magnesium
Potassium
Calcium
polyphenol oxidase
Correct answer
Magnesium
How many elements are there in nature as per latest periodic table?
107
110
115
118
Correct answer
107