Light year is a unit of which of the following physical sign?
(A) Short time interval
(B) mass
(C) Work
(D) distance
Light-year is the unit of length to measure large distances (astronomical distances).
The total distance travelled by light in 1 year is called 1 light year.
1 light-year = 9.46 × 1012 km.
Explanation for the incorrect options
The second (sec) is the unit of time.
A kg is the unit of mass.
Therefore, the Light year is the unit of distance. So, option (D) is correct.
Used in eyeglasses for a person suffering from myopia?
(A) convex lens
(B) concave lens
(C) concave mirror
(D) convex mirror
What type of force acts on a car moving on a circular curved path?
(A) Centrifugal force
(B) Cohesive force
(C) Centripetal force
(D) Gravitational force
Which of the following metals has maximum thermal conductivity?
(A) Iron
(B) Aluminum
(C) Silver
(D) Copper
What is the normal temperature of the human body?
(A) 65 degrees
(B) 95 degree
(C) 98.6°F
(D) 99 degrees
Normal body temperature is considered to be 37°C (98.6°F); however, a wide variation is seen. Among normal individuals, mean daily temperature can differ by 0.5°C (0.9°F), and daily variations can be as much as 0.25 to 0.5°C.
Jyoti is a unit of intensity?
(A) Opter
(B) Candela
(C) Newton
(D) None of these
Instrument for measuring blueness of the sky or ocean is called ___________.
(A) Bathymeter
(B) Ceraunograph
(C) Cyanometer
(D) Barometer
In May 2019, the kilogram was redefined for the first time in 130 years. It will now be redefined as a fundamental property of nature, called what?
(A) Planck's constant
(B) electrical constant
(C) Gravitational constant
(D) magnetic constant
Which of the following elements has lowest melting point?
(A) Titanium
(B) Sulphur
(C) Argon
(D) Zinc
Where does electric power reside in a charged conducting material?
(A) Central part
(B) Over the body
(C) Depends on the nature of the body
(D) The outer surface
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