Latest Science GK Questions and Answers
Ice is floating on water in a beaker when the ice melts completely, the level of water in the beaker will be?
(A) will increase
(B) first increase then decrease
(C) will decrease
(D) will remain the same
Correct Answer : D
Explanation :
Therefore, when the ice melts its volume decreases but the volume of water will remain the same. Hence even after the ice melts, there will be no rise in the level of the water. So, the level of the water will remain unchanged.
A person climbing a hill leans forward because?
(A) Able to walk fast
(B) To increase stability
(C) To conserve power
(D) Reduce the chances of slipping
Correct Answer : B
Force is the product of?
(A) mass and velocity
(B) weight and acceleration
(C) mass and acceleration
(D) weight and velocity
Correct Answer : C
If the velocity of an object is doubled?
(A) momentum is doubled
(B) kinetic energy becomes four times
(C) both of the above
(D) none of these
Correct Answer : C
A wooden swing is swinging in a sitting position, the time period of oscillations when the girl is standing?
(A) will decrease
(B) remain unchanged
(C) will be more
(D) none of these
Correct Answer : A
Which of the following metals is used as a semiconductor in transistors?
(A) Silver
(B) Graphite
(C) Germanium
(D) All of these
Correct Answer : C
What is a Coolidge tube used to produce?
(A) Micro waves
(B) Radio waves
(C) X Rays
(D) None of these
Correct Answer : C
What is silicon?
(A) Insulator
(B) Conductor
(C) Semiconductor
(D) None of these
Correct Answer : C
What is the anti-particle of electrons?
(A) Positron
(B) Proton
(C) Alpha-Particle
(D) Beta-Patakal
Correct Answer : A
Explanation :
The positron is the antiparticle to the electron. The positron has the same rest mass (m0) as the electron but opposite charge, one positive elementary charge. In condensed matter, each positron annihilates with an electron yielding γ-rays in a very short time (10−10–10−9 s).
Who is the discoverer of hydrogen?
(A) Priestley
(B) Cavendish
(C) Ure
(D) Levizer
Correct Answer : B
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Rajesh Bhatia
A Writer, Teacher and GK Expert. I am an M.A. & M.Ed. in English Literature and Political Science. I am highly keen and passionate about reading Indian History. Also, I like to mentor students about how to prepare for a competitive examination. Share your concerns with me by comment box. Also, you can ask anything at linkedin.com/in/rajesh-bhatia-7395a015b/.
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