(A) microwaves
(B) infrared
(C) X-rays
(D) ultraviolet
The answer is: (D) ultraviolet
Tag: physics mcqs
In humans, heart functions as a source of
(A) battery
(B) charge
(C) electric generator
(D) electromotive force
The answer is: (D) electromotive force
Short-sight defect could be corrected by a
(A) convex lens
(B) concave lens
(C) converging lens
(D) none of these
The answer is: (B) concave lens
A camera uses a ________ to form an image on a piece of film at the back.
(A) convex lens
(B) concave lens
(C) diverging lens
(D) none of these
The answer is: (A) convex lens
When white light passes through a prism, it splits into ________ colors.
(A) 3
(B) 5
(C) 7
(D) 9
The answer is: (C) 7
If we add all the 7 colors of rainbow (red, yellow, blue, green, orange, violet and indigo), the resultant color would be?
(A) White
(B) Black
(C) Maroon
(D) Dark Blue
The answer is: (A) White
What is the magnitude of the vector 12i-8j-24k?
(A) 18
(B) 28
(C) 38
(D) 48
The answer is: (B) 28
Solution
Magnitude = sqrt[(12)2+(-8)2+(-24)2]
= sqrt[144+64+576]
= sqrt[784]
= 28
Moment of inertia of solid sphere is
(A) 2/3 Mr2
(B) 1/2 Mr2
(C) 2/5 Mr2
(D) None of these
The answer is: (C) 2/5 Mr2
The moment of inertia of a solid sphere about its diameter is (2/5)Mr2.
Which of the following class has the largest number of animals?
(A) Fishes
(B) Insects
(C) Mammals
(D) None of these
The answer is (B) Insects
The process of preserving meat by stewing in a covered earthenware jug is called:
(A) Burial
(B) Jugging
(C) Curing
(D) None of these
The answer is (B) Jugging