set 2 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 2 EXERCISES
The following question based on physical properties of materials topic of general science mcq
(a) is more than before
(b) is less than before
(c) is the same as before
(d) depends upon his speed
The correct answers to the above question in:
Answer: (c)
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Read more physical properties of materials Based General Science Questions and Answers
Question : 1
Water is flowing through a horizontal pipe in streamline flow. At the narrowest part of the pipe
a) Pressure is maximum and velocity is minimum
b) Velocity is maximum and pressure is minimum
c) Both the pressure and velocity are maximum
d) Both the velocity and pressure are minimum
Answer »Answer: (b)
Question : 2
While lifting a bucket of water from a well, we feel that the bucket
a) Becomes lighter above the surface of water
b) Loses stability on coming out of the water
c) Becomes heavier above the surface of water
d) Has gained mass on coming out of water
Answer »Answer: (c)
Question : 3
The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied ?
a) Length = 100 cm, diameter = 1 mm
b) Length = 50 cm , diameter = 0.5 mm
c) Length = 200 cm, diameter = 2 mm
d) Length = 300 cm, diameter = 3 mm
Answer »Answer: (b)
Y=$\text"T/A"/\text"Δl/l"$
$Δl={T×l}/{A×Y}=T/Y×l/A$
Hence, $T/Y$ is constant. Therefore, $Δl = l/A$
$l/A$ is the largest in the first case.
Question : 4
In automobile hydraulic brakes work on
a) Newton’s law of motion
b) Bernoulli’s Principle
c) Archimedes Principle
d) Pascal’s Law
Answer »Answer: (d)
Question : 5
A drop of oil is placed on the surface of water. Which of the following statements is correct?
a) It will spread as a thin layer
b) It will remain on it as a sphere
c) It will partly be a spherical droplet and partly a thin film
d) It will float as a distorted drop on the water surface
Answer »Answer: (a)
The surface tension of oil is less than that of water, so the oil spreads as a thin layer.
Question : 6
Pressure at a point inside a liquid does not depend on
a) the nature of the liquid
b) the depth of the point below the surface of the liquid
c) the acceleration due to gravity at that point
d) the shape of the containing vessel
Answer »Answer: (d)
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