-
Chapter 2: Kinematics, Laws of Motion & Non-Inertial Frames (Set-3)
A body of mass m experiences zero net force. According to Newton’s laws, its motion is: A uniformly accelerated B constant velocity C oscillatory D undefined Explanation Newton’s First Law — no net force ⇒ velocity remains constant. If momentum p changes at a rate dp/dt, then dp/dt equals: A kinetic energy B impulse C…
-
Chapter 2: Kinematics, Laws of Motion & Non-Inertial Frames (Set-2)
Newton’s first law (law of inertia) states that a body remains at rest or moves with constant velocity unless acted on by a(n): A magnetic field B external net force C internal force only D change in temperature Explanation Newton I: no net external force ⇒ no change in motion. Newton’s second law in its…
-
Chapter 2: Kinematics, Laws of Motion & Non-Inertial Frames (Set-1)
A particle starts from rest and moves with constant acceleration a. Its velocity after time t is: A v = u − at B v = u + at C v = u + a/t D v = ut + a Explanation Starting from rest u = 0 ⇒ v = at. For motion with…
-
Chapter 1: Physical World, Measurement & Mathematical Tools (Set-4)
The physical law that electric charge is conserved is expressed as continuity equation ∂ρ/∂t + ∇·J = 0. This expresses local conservation of __________. A mass B charge C energy D momentum Explanation ρ is charge density, J current density — continuity expresses charge conservation. In spherical coordinates volume element dV = r^2 sinθ dr…
-
Chapter 1: Physical World, Measurement & Mathematical Tools (Set-3)
The SI base unit for mass is __________. A gram B kilogram C pound D slug Explanation Kilogram (kg) is SI base unit for mass. The notation [L]^n means __________. A unitless B dimension of length raised to power n C mass to power n D time to power n Explanation [L]^n denotes length dimension…
-
Chapter 1: Physical World, Measurement & Mathematical Tools (Set-2)
The SI unit of solid angle is dimensionless but commonly written as __________. A degree B steradian (sr) C radian D newton Explanation Steradian is the conventional label for solid angle. A scalar changes sign under parity if it is a __________. A true scalar B pseudoscalar C vector D tensor Explanation Pseudoscalars change sign…
-
Chapter 1: Physical World, Measurement & Mathematical Tools (Set-1)
The study of Physics mainly concerns the __________. A properties of languages B behavior of living organisms C nature and properties of matter and energy D origin of species Explanation Physics studies matter, energy and their interactions. Which of the following is not a primary goal of physics? A Describe natural phenomena B Predict future…
-
Physics MCQs
Subject wise MCQ’s ➣ Physical World, Measurement & Mathematical Tools 1 2 3 4 ➣ Kinematics, Laws of Motion & Non-Inertial Frames 1 2 3 4 ➣ Work, Energy, Power & System of Particles 1 2 3 4 ➣ Rotational Motion & Gravitation 1 2 3 4 ➣ Properties of Matter & Thermal Physics 1…
-
Chemistry MCQs
Subject wise MCQ’s ➣ Basic Concepts, Atomic Structure & Periodicity 1 2 3 4 ➣ Chemical Bonding, Molecular Structure & Coordination Chemistry 1 2 3 4 ➣ States of Matter + Solid & Liquid State Basics 1 2 3 4 ➣ Thermodynamics & Chemical/Phase Equilibrium 1 2 3 4 ➣ Solutions, Colligative Properties, Surface Chemistry…
-
Chapter 1: Basic Concepts, Atomic Structure & Periodicity (Set-4)
The number of moles present in 44 g of CO₂ is A 0.5 mol B 1.0 mol C 2.0 mol D 4.0 mol Explanation Moles = mass / molar mass = 44 / 44 = 1 mol. The number of atoms present in 23 g of sodium is A 3.011×10233.011 \times 10^{23}3.011×1023 B 6.022×10236.022 \times…
