Physics MCQs Class 9 | Quiz

Centripetal acceleration a = _____.

(A) v²/r
(B) g²/r
(C) ma
(D) mv²/r

Answer: (A) v²/r

Co-efficient of volume expansion as compare to co-efficient of linear expansion is ______ times greater.

(A) 1
(B) 2
(C) 3
(D) 4

Answer: (C) 3

Unit of Viscosity is _____.

(A) kgms^-1
(B) kgm^-1s^-1
(C) kgm²s
(D) kgm²s²

Answer: (B) kgm^-1s^-1

Least count of screw gauge is _____.

(A) 1 mm
(B) 0.1 mm
(C) 0.01 mm
(D) 0.001 mm

Answer: (C) 0.01 mm

What is the unit of Power in System International?

(A) Newton
(B) Watt
(C) Joule
(D) Meter

Answer: (B) Watt