(A) Power
(B) Electric current
(C) Energy
(D) Time
Answer: (C) Energy
Q. Ampere is a unit of:
(A) Power
(B) Electric current
(C) Energy
(D) Time
Answer: (B) Electric current
Q. Candela is a unit of:
(A) Energy
(B) Power
(C) Amount of substance
(D) Luminous intensity
Answer: (D) Luminous intensity
(A) 4 days
(B) 12 days
(C) 16 days
(D) 8 days
Answer: (D) 8 days
Q. The time required for a quantity to reduce to half of its initial value of a radioactive element is called:
(A) Half-life
(B) Divided-life
(C) Decreased-life
(D) None of these
Answer: (A) Half-life
Q. What is the half-life of Polonium-210?
(A) 138.376 days
(B) 148.376 days
(C) 158.376 days
(D) 168.376 days
Answer: (A) 138.376 days
(A) 2
(B) 3
(C) 0
(D) 4
Answer: (C) 0
Q. What is the name of heating device used to aid starting diesel engines?
(A) Glow plug
(B) Spark plug
(C) Thermostat plug
(D) None of these
Answer: (A) Glow plug
Q. The diesel engine also known as a compression-ignition (CI) engine is named after:
(A) Casey Diesel
(B) Rudolf Diesel
(C) Randall Diesel
(D) None of these
Answer: (B) Rudolf Diesel
(A) Optical fibre
(B) Transistor
(C) Decoder
(D) Photo diode
Answer: (D) Photo diode
Q. LED generates light with the help of charge carriers, it converts:
(A) Electrical enery into light energy
(B) Light energy in to electrical energy
(C) Electrons in to light
(D) None of these
Answer: (A) Electrical energy in to light energy
Q. What is “LED” stands for?
(A) Light emitting display
(B) Light emitting diode
(C) Low energy display
(D) None of these
Answer: (B) Light emitting diode
(A) Holes occurring in heavenly bodies
(B) Bright spots on the sun
(C) Collapsing objects of high density
(D) Collapsing objects of low density
Answer: (C) Collapsing objects of high density
Q. Area or boundary of the region associated with Black holes from which no escape is possible is called:
(A) Event Horizon
(B) Curved Horizon
(C) Black Horizon
(D) None of these
Answer: (A) Event Horizon
Q. The first image of a black hole, at the center of Galaxy Messier 87, was published by the Event Horizon Telescope (EHT) on:
(A) April 10, 2015
(B) April 10, 2017
(C) April 10, 2019
(D) None of these
Answer: (C) April 10, 2019