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Unit of electrical resistance in the International System of Units (SI) is:
AVolt
BAmpere
COhm
DWatt
Why does ice float on water?
AIce is denser than liquid water
BIce is less dense than liquid water
CIce absorbs air bubbles
DSurface tension holds ice above water
The principle behind the working of a hydraulic lift is based on:
AArchimedes' Principle
BBernoulli's Principle
CPascal's Law
DBoyle's Law
Escape velocity from the surface of Earth is approximately:
A9.8 km/s
B11.2 km/s
C15.0 km/s
D25.2 km/s
Which property of light is responsible for the formation of a rainbow?
AReflection only
BRefraction, dispersion, and total internal reflection
CDiffraction and interference
DPolarization
The diagonal of a square field is 20 meters. What is the area of the square field?
A100 m²
B200 m²
C282 m²
D400 m²
Solve for x in the quadratic equation x^2 – 7x + 12 = 0.
Ax = 2, 5
Bx = 3, 4
Cx = -3, -4
Dx = 1, 12
A shopkeeper sells an article for Rs. 480 at a loss of 20%. At what price should he sell it to make a profit of 20%?
ARs. 600
BRs. 640
CRs. 720
DRs. 800
The average age of a group of 5 friends is 22 years. If a new friend joins them, the average age becomes 24 years. What is the age of the new friend?
A30 years
B32 years
C34 years
D36 years
A sum of money doubles itself in 8 years at simple interest. What is the annual rate of interest?
A10%
B12.5%
C15%
D16.67%