Free Physics MCQs Mock Test Online with Answers

Q1 : A circuit has a node with three currents entering: 2A, 3A, and 4A. What is the sum of currents leaving the node?

A: 2A B: 3A C: 9A D: None

Q2 : What is the concept of comet?

A: Small, icy body in solar system B: Large, icy body in solar system C: Both a & b D: None

Q3 : What is the concept of stellar evolution?

A: Change in star over time B: Change in galaxy over time C: Both a & b D: None

Q4 : What is the threshold energy of a nuclear reaction?

A: Minimum energy required for the reaction to occur B: Maximum energy required for the reaction to occur C: Energy released in the reaction D: Energy absorbed in the reaction

Q5 : What is the concept of capillary rise?

A: Rise of fluid in a narrow tube B: Fall of fluid in a narrow tube C: Both a & b D: None

Q6 : A circuit has a resistance of 10Ω and a current of 2A. What is its voltage?

A: 10V B: 20V C: 40V D: None

Q7 : What is the application of radioactivity in medicine?

A: Diagnosis B: Treatment C: Research D: All of the above

Q8 : What is the mass defect of helium-4?

A: 0.0304 amu B: 0.0304 MeV C: 0.0304 kg D: 0.0304 J

Q9 : What is the equation for resonance frequency?

A: ω_r = √(k/m) B: ω_r = √(m/k) C: ω_r = √(b/m) D: None

Q10 : What is the capillary action?

A: The rise of a liquid in a narrow tube B: The fall of a liquid in a narrow tube C: The flow of a liquid in a wide tube D: The flow of a liquid in a narrow tube

Q11 : What is cosmology?

A: Study of the origin and evolution of the universe B: Study of the structure of the universe C: Study of the stars and galaxies D: None

Q12 : What is the concept of center of buoyancy?

A: Center of gravity of fluid displaced B: Center of gravity of object C: Both a & b D: None

Q13 : What is the most common type of nuclear decay?

A: Alpha decay B: Beta decay C: Gamma decay D: Electron capture

Q14 : What is the mass defect of oxygen-16?

A: 0.1368 amu B: 0.1368 MeV C: 0.1368 kg D: 0.1368 J

Q15 : A circuit has a voltage source and a resistor in series. What is the current through the resistor?

A: Equal to the voltage source B: Equal to the resistor value C: Equal to the voltage divided by resistance D: None

Q16 : What is a fuse?

A: A device that protects a circuit from excessive current B: A device that generates electricity C: A component that opposes electric current D: None

Q17 : What is the most common type of nuclear reaction used in energy production?

A: Fission B: Fusion C: Radioactive decay D: Nuclear scattering

Q18 : What is the concept of galaxy evolution?

A: Change in galaxy over time B: Change in star over time C: Both a & b D: None

Q19 : A circuit has a resistance of 15Ω and a current of 2A. What is its voltage?

A: 30V B: 15V C: 45V D: None

Q20 : What is the Reynolds number used for?

A: Predicting flow pattern B: Predicting pressure drop C: Predicting flow velocity D: None

Q21 : What is the concept of equipotential line?

A: Line of constant velocity potential B: Line of constant stream function C: Line of constant pressure D: None

Q22 : What is the condition for an object to float?

A: Density of object is less than fluid B: Density of object is greater than fluid C: Both a & b D: None

Q23 : What is the energy dissipated by a 10Ω resistor in a parallel circuit with a 20V battery and a 10Ω resistor for 2s?

A: 20J B: 40J C: 80J D: None

Q24 : What is the concept of white dwarf?

A: Small, hot, and dense star B: Large, cool, and dense star C: Both a & b D: None

Q25 : What is the principle of a nuclear power plant?

A: Nuclear fission B: Nuclear fusion C: Radioactivity D: Ionization

Q26 : What is a Thevenin equivalent circuit?

A: A simplified circuit with a single voltage source and resistance B: A circuit with multiple voltage sources C: A circuit with multiple resistances D: None

Q27 : What is the critical Reynolds number?

A: The Reynolds number at which the flow changes from laminar to turbulent B: The Reynolds number at which the flow changes from turbulent to laminar C: The Reynolds number at which the flow becomes unstable D: The Reynolds number at which the flow becomes stable

Q28 : What is the mass defect of a nucleus?

A: Difference between the mass of the nucleus and the sum of the masses of its constituents B: Difference between the mass of the nucleus and the mass of the atom C: Difference between the mass of the nucleus and the mass of the electron D: Difference between the mass of the nucleus and the mass of the proton

Q29 : What is the concept of damping of oscillation?

A: Reduction in amplitude B: Increase in amplitude C: Both a & b D: None

Q30 : What is the study of fluids at rest called?

A: Fluid dynamics B: Fluid statics C: Hydrodynamics D: Aerodynamics

Q31 : What is the concept of dark energy?

A: Energy that accelerates universe expansion B: Energy that decelerates universe expansion C: Both a & b D: None

Q32 : What is the concept of wettability?

A: Ability of fluid to spread on solid B: Ability of fluid to stick to solid C: Both a & b D: None

Q33 : What is the superposition theorem used for in electric circuits?

A: To find the voltage across a component B: To find the current through a component C: To simplify the analysis of a circuit with multiple sources D: None

Q34 : What is the difference between a nuclear reaction and a nuclear decay?

A: Nuclear reaction involves a change in the nucleus, nuclear decay does not B: Nuclear reaction does not involve a change in the nucleus, nuclear decay does C: Nuclear reaction is a physical change, nuclear decay is a chemical change D: Nuclear reaction is a chemical change, nuclear decay is a physical change

Q35 : What is the Planck satellite used for in cosmology?

A: To study the cosmic microwave background radiation B: To study dark matter C: To study dark energy D: None

Q36 : What is a black hole?

A: A region in space with extremely strong gravity B: A star that has exploded C: A planet with a solid surface D: None

Q37 : What is the power dissipated by a resistor with a resistance of 10Ω and a current of 2A?

A: 20W B: 40W C: 80W D: None

Q38 : What is the energy source of stars?

A: Nuclear fission B: Nuclear fusion C: Radioactivity D: Chemical reactions

Q39 : A circuit has a voltage source and a resistor in parallel. What is the energy stored in the resistor?

A: Equal to the voltage source B: Equal to the resistor value C: Equal to the product of voltage and current D: None

Q40 : What is the most common type of ionizing radiation?

A: Alpha radiation B: Beta radiation C: Gamma radiation D: X-ray radiation

Q41 : What is the concept of drag force?

A: Force opposing motion B: Force supporting motion C: Both a & b D: None of these

Q42 : What is the purpose of using KCL and KVL in circuit design?

A: To design a circuit with specific voltage and current B: To design a circuit with specific resistance and power C: To design a circuit with specific energy and efficiency D: None

Q43 : A circuit has a voltage source and two resistors in series. What is the voltage across each resistor?

A: Equal to the battery voltage B: Proportional to the resistance value C: Inversely proportional to the resistance value D: None

Q44 : What is the power dissipated by a resistor with a resistance of 5Ω and a voltage of 10V?

A: 10W B: 20W C: 40W D: None

Q45 : A circuit has a 10Ω resistor and a 20Ω resistor in series. What is the current through the circuit if the battery voltage is 30V?1A

A: 1A B: 2A C: 3A D: None

Q46 : What is the name of the galaxy that is expected to collide with the Milky Way in about 4 billion years?

A: Andromeda Galaxy B: Triangulum Galaxy C: Sombrero Galaxy D: Pinwheel Galaxy

Q47 : What is the atomic radius trend in a group?

A: Increases B: Decreases C: Remains same D: None

Q48 : What is the Q-value of a nuclear reaction?

A: Energy released in the reaction B: Energy absorbed in the reaction C: Mass defect of the reaction D: Binding energy of the reaction

Q49 : What is gamma decay?

A: Emission of an electron B: Emission of a photon C: Emission of a helium nucleus D: Emission of a neutron

Q50 : What is the Virgo Cluster?

A: A galaxy cluster B: A star cluster C: A planet cluster D: None

Q51 : What is the cosmic inflation theory?

A: The universe underwent a rapid expansion in the early stages B: The universe has always been expanding at a steady rate C: The universe is contracting D: None

Q52 : What is the fuel used in a nuclear power plant?

A: Uranium-235 B: Uranium-238 C: Plutonium-239 D: Thorium-232

Q53 : What is the name of the dwarf planet that is a Kuiper Belt object?

A: Pluto B: Eris C: Ceres D: None

Q54 : What is the equation for capillary rise?

A: h = 2T cosθ / ρgr B: h = 2T sinθ / ρgr C: h = 2T / ρgr D: None

Q55 : What is the concept of buoyancy force on a partially submerged object?

A: Force equals weight of fluid displaced B: Force is less than weight of fluid displaced C: Force is greater than weight of fluid displaced D: None

Q56 : What is the difference between gauge pressure and absolute pressure?

A: Gauge pressure is the pressure above atmospheric pressure, while absolute pressure is the pressure B: Gauge pressure is the pressure below atmospheric pressure, while absolute pressure is the pressure above atmospheric pressure C: Gauge pressure is the pressure above atmospheric pressure, while absolute pressure is the total pressure D: Gauge pressure is the total pressure, while absolute pressure is the pressure above atmospheric pressure

Q57 : What is the concept of asteroid belt?

A: Region of asteroids in solar system B: Region of planets in solar system C: Both a & b D: None

Q58 : What is gamma decay?

A: Emission of an electron B: Emission of a photon C: Emission of a helium nucleus D: Emission of a neutron

Q59 : What is the radius of the nth orbit?

A: r_n = n^2 a_0 B: r_n = a_0/n^2 C: r_n = n a_0 D: None

Q60 : What is the most effective way to reduce radiation exposure?

A: Time B: Distance C: Shielding D: All of the above

Q61 : What is the energy dissipated by a resistor with a voltage of 15V and a current of 2A for 4s?

A: 30J B: 60J C: 120J D: None

Q62 : What is a current divider?

A: A circuit that divides the current into two or more parts B: A circuit that increases the current C: A circuit that decreases the voltage D: None

Q63 : What is the difference between a wetting and a non-wetting liquid?

A: A wetting liquid has a contact angle of 0°, while a non-wetting liquid has a contact angle of 180° B: A wetting liquid has a contact angle of 180°, while a non-wetting liquid has a contact angle of 0° C: A wetting liquid has a contact angle of 90°, while a non-wetting liquid has a contact angle of 90° D: A wetting liquid has a contact angle of 45°, while a non-wetting liquid has a contact angle of 135°

Q64 : What is an electric circuit?

A: A path for electric current to flow B: A device that generates electricity C: A type of electrical component D: None

Q65 : What is the surface tension?

A: The force acting along the surface of a liquid B: The force acting perpendicular to the surface of a liquid C: The force acting at an angle to the surface of a liquid D: The force acting inside a liquid

Q66 : What is the difference between a nuclear reaction and a particle reaction?

A: Nuclear reaction involves a nucleus, particle reaction involves particles B: Nuclear reaction involves particles, particle reaction involves a nucleus C: Nuclear reaction is a physical change, particle reaction is a chemical change D: Nuclear reaction is a chemical change, particle reaction is a physical change

Q67 : What is the concept of buoyancy in gases?

A: Upward force on an object B: Downward force on an object C: Both a & b D: None

Q68 : What is binding energy?

A: Energy required to separate a nucleus into its constituent nucleons B: Energy released when a nucleus is formed from its constituent nucleons C: Energy required to add a nucleon to a nucleus D: Energy released when a nucleon is removed from a nucleus

Q69 : What is the instrument used to measure pressure?

A: Manometer B: Barometer C: Thermometer D: None

Q70 : What is the concept of buoyancy?

A: Upward force on an object B: Downward force on an object C: Both a & b D: None

Q71 : What is dark energy?

A: Energy that accelerates universe expansion B: Energy that decelerates universe expansion C: A type of star D: None

Q72 : A circuit has a voltage source and a resistor in parallel. What is the current through the resistor?

A: Equal to the voltage source B: Equal to the resistor value C: Equal to the voltage divided by resistance D: None

Q73 : What is a star?

A: A massive ball of hot, glowing gas B: A small, cold, and dark object C: A planet with a solid surface D: None

Q74 : What is the difference between nuclear fission and nuclear fusion?

A: Fission is the combination of nuclei, fusion is the splitting of nuclei B: Fission is the splitting of nuclei, fusion is the combination of nuclei C: Fission is the emission of radiation, fusion is the absorption of radiation D: Fission is the absorption of radiation, fusion is the emission of radiation

Q75 : What is the unit of electric current?

A: Ampere (A) B: Volt (V) C: Ohm (Ω) D: None

Q76 : What is beta decay?

A: Emission of an electron B: Emission of a photon C: Emission of a helium nucleus D: Emission of a neutron

Q77 : What is the study of fluids at rest called?

A: Fluid dynamics B: Fluid statics C: Hydrodynamics D: Aerodynamics

Q78 : What is the concept of flow net?

A: Graphical representation of flow B: Mathematical representation of flow C: Both a & b D: None

Q79 : What is the condition for neutral buoyancy?

A: Density of object equals fluid density B: Density of object is greater than fluid density C: Density of object is less than fluid density D: None

Q80 : What is the atomic number equal to?

A: Number of protons B: Number of neutrons C: Number of electrons D: None of the above

Q81 : What is the power dissipated by a 10Ω resistor in a parallel circuit with a 20V battery and a 20Ω resistor?

A: 10W B: 20W C: 40W D: All of the above

Q82 : What is the binding energy per nucleon of uranium-238?

A: 7.57 MeV B: 6.4 MeV C: 5.2 MeV D: 4.5 MeV

Q83 : What is the most common type of particle reaction?

A: Scattering B: Decay C: Annihilation D: Creation

Q84 : What is the process by which an unstable nucleus loses energy?

A: Radioactivity B: Nuclear fission C: Nuclear fusion D: Ionization

Q85 : Which planet has a highly circular orbit?

A: Earth B: Venus C: Neptune D: None

Q86 : What is the name of the process by which a nucleus splits into two or more smaller nuclei?

A: Nuclear fission B: Nuclear fusion C: Radioactivity D: Ionization

Q87 : What is the unit of power?

A: Watt (W) B: Ampere (A) C: Volt (V) D: None

Q88 : What is the force exerted by a fluid on an object?

A: Drag force B: Lift force C: Buoyant force D: None

Q89 : How many types of galaxies are there?

A: 2 B: 3 C: 4 D: None

Q90 : What is the phenomenon where a star explodes and becomes extremely bright?

A: Supernova B: Black hole C: Neutron star D: None of the above

Q91 : What is the binding energy of oxygen-16?

A: 127.6 MeV B: 8.0 MeV C: 7.5 MeV D: 6.5 MeV

Q92 : What is the instrument used to measure pressure?

A: Manometer B: Barometer C: Thermometer D: None

Q93 : What is the concept of cosmological inflation?

A: The universe underwent a rapid expansion in the early stages B: The universe has always been expanding at a steady rate C: The universe is contracting D: None

Q94 : What is the shielding material for alpha radiation?

A: Paper B: Aluminum C: Lead D: Concrete

Q95 : What is the risk associated with nuclear power plants?

A: Radiation exposure B: Nuclear explosion C: Environmental contamination D: All of the above

Q96 : What is the concept of positive buoyancy?

A: Object floats B: Object sinks C: Object remains suspended D: None

Q97 : What is the unit of voltage in KVL?

A: Volt (V) B: Ampere (A) C: Ohm (Ω) D: None

Q98 : What is the most stable isotope of uranium?

A: Uranium-235 B: Uranium-238 C: Uranium-239 D: Uranium-239

Q99 : What is the most stable nucleus?

A: Iron-56 B: Nickel-62 C: Oxygen-16 D: Helium-4

Q100 : What is the name of the spacecraft that orbited Saturn?

A: Cassini B: Voyager 1 C: New Horizons D: None

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