World GK MCQs

# Famous Theories and Laws MCQs with Answers

According to Newton’s first law of motion, an object at rest will remain at rest unless acted upon by an external force. What is this law commonly known as?
a) Law of Conservation of Energy
b) Law of Inertia
c) Law of Gravitation
d) Law of Action and Reaction

Which theory states that all living organisms are composed of cells?
a) Theory of Evolution
b) Cell Theory
c) Theory of Relativity
d) Germ Theory

According to Einstein’s theory of relativity, what is the maximum speed at which information or matter can travel in the universe?
a) Speed of Light
b) Speed of Sound
c) Speed of Thought
d) Speed of Electricity

Who proposed the theory of general relativity?
a) Isaac Newton
b) Albert Einstein
c) Nikola Tesla
d) Charles Darwin

Which theory explains the force of gravity as the curvature of spacetime caused by mass and energy?
a) Theory of Gravity
b) Law of Gravitation
c) Theory of Relativity
d) Quantum Theory

Which law states that the total pressure exerted by a mixture of non-reacting gases is equal to the sum of the partial pressures of the individual gases?
a) Boyle’s Law
b) Gay-Lussac’s Law
c) Dalton’s Law

Who proposed the theory of evolution through natural selection?
a) Charles Darwin
b) Gregor Mendel
c) Louis Pasteur
d) James Watson

According to Ohm’s law, what is the relationship between voltage, current, and resistance in an electrical circuit?
a) V = IR
b) P = IV
c) F = ma
d) E = mc^2

Which law states that the volume of a gas is inversely proportional to its pressure at a constant temperature?
a) Boyle’s Law
b) Charles’s Law
c) Dalton’s Law

Which law states that the rate of a chemical reaction is directly proportional to the product of the concentrations of the reactants?
a) Law of Conservation of Mass
b) Law of Conservation of Energy
c) Law of Mass Action
d) Law of Definite Proportions
Answer: c) Law of Mass Action

Who proposed the theory of special relativity?
a) Isaac Newton
b) Albert Einstein
c) Max Planck
d) Ernest Rutherford

According to Kepler’s laws of planetary motion, what is the shape of a planet’s orbit around the Sun?
a) Circle
b) Ellipse
c) Parabola
d) Hyperbola

Who proposed the theory of general adaptation syndrome, which describes the body’s response to stress?
a) Hans Selye
b) Sigmund Freud
c) Ivan Pavlov
d) Carl Jung

According to Mendel’s laws of inheritance, what is the basic unit of heredity?
a) Gene
b) Chromosome
c) Allele
d) Phenotype

Who proposed the theory of plate tectonics, which explains the movement of Earth’s lithospheric plates?
a) Alfred Wegener
b) Charles Darwin
c) Galileo Galilei
d) Isaac Newton

Which theory states that Earth’s continents were once joined together in a single supercontinent called Pangaea?
a) Theory of Plate Tectonics
b) Theory of Evolution
c) Theory of Gravity
d) Theory of Relativity
Answer: a) Theory of Plate Tectonics

According to the first law of thermodynamics, what is the principle of conservation related to?
a) Energy
b) Momentum
c) Mass
d) Charge

Who proposed the theory of operant conditioning, which suggests that behavior is strengthened or weakened by the consequences that follow it?
a) B.F. Skinner
b) Ivan Pavlov
c) John B. Watson
d) Carl Rogers

According to Dalton’s atomic theory, what is the smallest unit of an element that retains its chemical properties?
a) Atom
b) Molecule
c) Proton
d) Electron

Who proposed the theory of psychoanalysis, which emphasizes the role of the unconscious mind in shaping human behavior?
a) Sigmund Freud
b) Carl Jung
d) Erik Erikson

Which law states that for every action, there is an equal and opposite reaction?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Newton’s Law of Universal Gravitation

According to the law of conservation of energy, energy cannot be created or destroyed, but it can be transformed from one form to another. Which branch of physics is concerned with the study of energy and its transformations?
a) Thermodynamics
b) Optics
c) Quantum Mechanics
d) Electromagnetism

Who proposed the theory of cognitive development, which focuses on the intellectual growth of individuals?
a) Jean Piaget
b) Lev Vygotsky
c) Erik Erikson
d) Lawrence Kohlberg

According to the law of supply and demand, what happens to the price of a product when its demand increases and its supply decreases?
a) Price increases
b) Price decreases
c) Price remains the same
d) Price fluctuates randomly

Which law states that the pressure of a gas is directly proportional to its temperature at constant volume?
a) Boyle’s Law
b) Charles’s Law
d) Gay-Lussac’s Law

Who proposed the theory of multiple intelligences, which suggests that intelligence is not a single, fixed trait?
a) Howard Gardner
b) Alfred Binet
c) David Wechsler
d) Lewis Terman

According to the law of reflection, what happens to the angle of incidence of a light ray when it reflects off a surface?
a) It increases
b) It decreases
c) It remains the same
d) It becomes zero
Answer: c) It remains the same

Which law states that the entropy of an isolated system always increases over time?
a) Law of Conservation of Mass
b) Second Law of Thermodynamics
c) Law of Conservation of Energy
d) Law of Definite Proportions
Answer: b) Second Law of Thermodynamics

Who proposed the theory of behaviorism, which emphasizes the role of external stimuli in shaping behavior?
a) John B. Watson
b) B.F. Skinner
c) Ivan Pavlov
d) Edward Thorndike

According to the law of diminishing marginal utility, what happens to the satisfaction derived from consuming additional units of a product as the quantity consumed increases?
a) It increases
b) It remains the same
c) It decreases
d) It becomes negative

Which law states that the total electric charge of an isolated system remains constant over time?
a) Law of Conservation of Charge
b) Coulomb’s Law
c) Ohm’s Law
d) Ampere’s Law
Answer: a) Law of Conservation of Charge

Who proposed the theory of cognitive dissonance, which suggests that individuals experience mental discomfort when their beliefs and behaviors are inconsistent?
a) Leon Festinger
b) B.F. Skinner
c) Ivan Pavlov
d) Abraham Maslow

According to Hooke’s law, what is the relationship between the force applied to a spring and its resulting displacement?
a) F = ma
b) F = qvB
c) F = kx
d) F = G(m1m2/r^2)

Which law states that the total resistance of resistors in a series circuit is equal to the sum of their individual resistances?
a) Ohm’s Law
b) Kirchhoff’s Law
c) Joule’s Law
d) Law of Series Circuits
Answer: d) Law of Series Circuits

Who proposed the theory of psychosexual development, which suggests that personality development is influenced by early childhood experiences?
a) Sigmund Freud
b) Erik Erikson
c) Carl Jung
d) Albert Bandura

According to the law of demand, what happens to the quantity demanded of a product when its price increases?
a) Quantity demanded increases
b) Quantity demanded decreases
c) Quantity demanded remains the same
d) Quantity demanded becomes zero

Which law states that the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to its resistance?
a) Ampere’s Law
c) Kirchhoff’s Law
d) Ohm’s Law

Who proposed the theory of cognitive dissonance, which suggests that individuals experience mental discomfort when their beliefs and behaviors are inconsistent?
a) Leon Festinger
b) B.F. Skinner
c) Ivan Pavlov
d) Abraham Maslow

According to the law of conservation of momentum, what happens to the total momentum of a system of objects in the absence of external forces?
a) It increases
b) It decreases
c) It remains the same
d) It becomes zero
Answer: c) It remains the same

Which law states that the force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Newton’s Law of Universal Gravitation
Answer: d) Newton’s Law of Universal Gravitation