What is the principal focus of a spherical mirror?
A) It is a point from which the rays of light appear to be coming from on the principal axis of a convex mirror
B) It is the point on the principal axis through which rays of light parallel to the principal axis pass after reflection or appear to be arising from this point on the principal axis
C) It is the centre of a hollow sphere of which the spherical mirror is a part
D) It is the midpoint of a spherical mirror
A) It is a point from which the rays of light appear to be coming from on the principal axis of a convex mirror
B) It is the point on the principal axis through which rays of light parallel to the principal axis pass after reflection or appear to be arising from this point on the principal axis
C) It is the centre of a hollow sphere of which the spherical mirror is a part
D) It is the midpoint of a spherical mirror
Answer & ExplanationAnswer: B) It is the point on the principal axis through which rays of light parallel to the principal axis pass after reflection or appear to be arising from this point on the principal axis
A sentence has been given in Active/Passive Voice. Out of the four given alternatives, select the one which best expresses the same sentence in Passive/Active Voice.
The Chinese company manufactured those robots.
A) Those robots were manufactured by the Chinese company.
B) Those robots was manufacture by the Chinese company.
C) These robots were manufactured by the Chinese company.
D) The robots was manufactured by the Chinese company.,
A) Those robots were manufactured by the Chinese company.
B) Those robots was manufacture by the Chinese company.
C) These robots were manufactured by the Chinese company.
D) The robots was manufactured by the Chinese company.,
Answer & ExplanationAnswer: A) Those robots were manufactured by the Chinese company.
In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.
Mark won all of (1)/ the award for the categories (2)/ in which he was nominated. (3)/ No error (4)