(A) Zero
(B) 2F Newton
(C) F Newton
(D) 1/2F Newton
Answer: (B) 2F Newton
Category: Physics MCQs Class 9
Physics solved multiple choice questions (MCQs) for class 9 with answers.
When an object is moving with uniformly changing speed then the slope of the speed-time graph determines the magnitude of:
(A) Displacement
(B) Velocity
(C) Acceleration
(D) Momentum
Answer: (C) Acceleration
Significant figures in a number are:
(A) All the accurately known digits and the first doubtful digit
(B) All the digits
(C) All the accurately known digits
(D) All the accurately known digits and all the doubtful digits
Answer: (A) All the accurately known digits and the first doubtful digit
Least Count of a measuring cylinder is:
(A) 1 m3
(B) 0.01 ml
(C) 0.1 mL
(D) 1 mL
Answer: (D) 1 mL
SI unit of thermal conductivity is:
(A) Wk-1
(B) Wm-1 k-1
(C) Wmk-1
(D) Wm-1 k
Answer: (B) Wm-1 k-1