(A) Attraction among the Planets
(B) Attraction among the Planets and the Sun
(C) Radiations from the Sun
(D) Gravitational pull of the Sun
The answer is: (D) Gravitational pull of the Sun
Author: Irza Afzad
There are ________ planets in orbit around the Sun.
(A) 6
(B) 7
(C) 8
(D) 9
The answer is: (C) 8
The distance of Moon from the Earth is ________ km.
(A) 364,000
(B) 384,000
(C) 464,000
(D) 484,000
The answer is: (B) 384,000
Ozone layer protects the Earth from ________ radiations from the Sun.
(A) microwaves
(B) infrared
(C) X-rays
(D) ultraviolet
The answer is: (D) ultraviolet
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