TNPSC Group 1 Last 10 Years Question Papers with Answers Pdf - 1
Question: 1
Erg × Sec is the unit of
(A) Planck's constant
(B) Angular momentum
(C) Linear momentum
(D) Energy
Ans: A
Planck's constant
Question: 2
When a fluid passes through the constricted art of a pipe, its
(A) Velocity increases and pressure decreases
(B) Velocity decreases and pressure increases
(C) Velocity and pressure increase
(D) Velocity and pressure decrease
Ans: A
Velocity increases and pressure decreases
Question: 3
One fermimetre is equal to
(A) 10-9 m
(B) 10-12 m
(C) 10-15 m
(D) 10-18 m
Ans: C
10-15 m
Question: 4
Rainbow is formed due to a combination of
(A) Refraction and scattering
(B) Dispersion and focusing
(C) Dispersion and total internal reflection
(D) Refraction and absorption
Ans: C
Dispersion and total internal reflection
Question: 5
Which one of the following phenomena is used in optical fibres?
(A) Total internal reflection
(B) Refraction
(C) Successive reflections
(D) Scattering
Ans: A
Total internal reflection
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