Physics MCQs quiz test questions with answers for FPSC CSS PPSC NTS SPSC KPPSC test preparation, including questions from physics past papers. Basic Physics MCQ of class 9, 10, 11, 12 and advanced Physics MCQs of BSc, MSc or Masters level.
Question: A material of density ρ is compressed and its all sides becomes half of the original length. What is the new density of the material?
(A) 0.125 ρ
(B) 0.50 ρ
(C) 2.0 ρ
(D) 8.0 ρ
The answer is: (D) 8.0 ρ
Density (ρ) = mass/volume = m/v = m/(length.width.height)
After compression, length, width, height becomes half. So,
Density (ρ) = m/[(1/2)length.(1/2)width.(1/2)height]
Finally, we have m/v = 8.0 ρ
(A) 20,000 km/h
(B) 30,000 km/h
(C) 40,000 km/h
(D) 50,000 km/h
The answer is: (C) 40,000 km/h
A minimum speed of 40,000 km/h is required to leave the planet Earth and enter space.
(A) photons
(B) molecules
(C) elements
(D) quarks
The answer is: (D) quarks
Subatomic particles, for example, electrons, protons and neutrons, are made up of quarks.
(A) 500 nano-meter
(B) 600 nano-meter
(C) 700 nano-meter
(D) 800 nano-meter
The answer is: (C) 700 nano-meter
The human eye can view electromagnetic radiation of wavelengths from 400 nano-meter to 700 nano-meter.
(A) Plane
(B) Concave
(C) Convex
(D) (A) or (C)
The answer is: (B) Concave
(A) Plane
(B) Concave
(C) Convex
(D) (A) or (B)
The answer is: (C) Convex
(A) Microwaves
(B) Radio waves
(C) Infrared rays
(D) X-Rays
The answer is: (A) Microwaves
Physics multiple choice questions with answers.