0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

# Assertion: Aeroplanes are given streamlining to increase the speed of vehicles.Reason: Air friction decreases due to streamlining.Both Assertion and Reason are true. Reason is the correct explanation of Assertion.Both Assertion and Reason are true. Reason is not the correct explanation of Assertion.Assertion is true and Reason is false.Both Assertion and Reason are false.

A
Both Assertion and Reason are true. Reason is the correct explanation of Assertion.
B
Assertion is true and Reason is false.
C
Both Assertion and Reason are true. Reason is not the correct explanation of Assertion.
D
Both Assertion and Reason are false.
Solution
Verified by Toppr

#### When aeroplane moves through air, its motion is opposed by the air friction, which depends upon the shape of the body of aeroplane. Hence, the planes are given stream lined shape so that air friction is minimum. The movement of air on the upper and lower side of the streamlined shaped body provides a lift.Hence, both the assertion and the reason are correct and Reason is the correct explanation of the Assertion.

Was this answer helpful?
0
Similar Questions
Q1
(i)
Assertion: A circle is not a rectilinear figure.
Reason: A figure formed by straight lines only is called a rectilinear figure.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.
(ii)
Assertion: All right angles are equal to one another.
Reason: A unique line passes through a single point.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.
View Solution
Q2
Assertion : Amount of cyanocobalamine required daily is 3 mcg
Reason : Its deficiency causes pernicious anaemia
View Solution
Q3
Assertion: Every parallelogram is a rectangle.
Reason: The angle bisectors of a parallelogram form a rectangle.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.
View Solution
Q4
Assertion: A cyclic parallelogram is a square.
Reason: Diameter is the largest chord in a circle.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.
View Solution
Q5
Assertion: The point O(0, 0) lies in quadrant I.
Reason: The point O(0, 0) lies on both the axes.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.
View Solution