Free Physics MCQs Mock Test Online with Answers

Q1 : What is a fluid?

A: A substance that can flow B: A substance that cannot flow C: A substance that is always at rest D: A substance that is always in motion

Q2 : 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

Q3 : What is the process by which stars generate energy?

A: Nuclear fission B: Nuclear fusion C: Radioactive decay D: None

Q4 : 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

Q5 : What is a red giant?

A: A star that has expanded and cooled B: A star that has shrunk and heated up C: A planet with a solid surface D: None

Q6 : Which type of radiation has the highest penetrating power?

A: Alpha B: Beta C: Gamma D: None

Q7 : What is an inductor?

A: A component that stores energy in a magnetic field B: A component that opposes electric current C: A component that generates electricity D: None

Q8 : 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

Q9 : 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

Q10 : What is beta decay?

A: Emission of a beta particle from a nucleus B: Emission of an alpha particle from a nucleus C: Emission of a gamma ray from a nucleus D: Emission of an electron from a nucleus

Q11 : What is the spin of a nucleus?

A: Intrinsic angular momentum B: Orbital angular momentum C: Total angular momentum D: Magnetic moment

Q12 : What is the equation for buoyant force?

A: F_b = ρVg B: F_b = ρV/g C: F_b = ρg/V D: None

Q13 : What is fluid mechanics?

A: Study of fluids at rest B: Study of fluids in motion C: Study of solids in motion D: Study of gases only

Q14 : 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

Q15 : What is the name of the mission that sent astronauts to the Moon?

A: Apollo B: Gemini C: Mercury D: None

Q16 : What is the power dissipated by a 10Ω resistor in a series circuit with a 20V battery and a 10Ω resistor?

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

Q17 : What is the relationship between binding energy and mass defect?

A: Binding energy is equal to the mass defect B: Binding energy is proportional to the mass defect C: Binding energy is inversely proportional to the mass defect D: Binding energy is unrelated to the mass defect

Q18 : 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

Q19 : What is the concept of black hole information paradox?

A: Information lost in black hole B: Information not lost in black hole C: Both a & b D: None

Q20 : A circuit has two 10Ω resistors in series and a 20Ω resistor in parallel with the combination. What is the total resistance?

A: 10Ω B: 20Ω C: 25Ω D: None

Q21 : What is the concept of center of pressure?

A: Point where pressure acts B: Point where weight acts C: Both a & b D: None

Q22 : What is the unit of current in KCL?

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

Q23 : What is the current through a 10Ω resistor in a series circuit with a 20V battery and a 20Ω resistor?

A: 0.5A B: 1A C: 2A D: None

Q24 : What is the relationship between resistance and conductance?

A: R = 1/G B: R = G C: R = G^2 D: None

Q25 : 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

Q26 : What is the unit of pressure?

A: Pascal B: Newton C: Joule D: None

Q27 : What is the purpose of a ground connection in an electric circuit?

A: To provide a path for current to flow to earth B: To increase the voltage of the circuit C: To decrease the resistance of the circuit D: None

Q28 : What is the most common type of particle reaction?

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

Q29 : A circuit has a voltage of 10V and a current of 2A. What is its power?

A: 20W B: 5W C: 10W D: None

Q30 : 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

Q31 : What is the most common method of radioactive dating?

A: Carbon-14 dating B: Potassium-argon dating C: Uranium-lead dating D: Rubidium-strontium dating

Q32 : What is the mass defect of iron-56?

A: 0.528 amu B: 0.528 MeV C: 0.528 kg D: 0.528 J

Q33 : What is the Small Magellanic Cloud?

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

Q34 : 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

Q35 : What is the concept of star formation?

A: Process of star creation B: Process of galaxy creation C: Both a & b D: None

Q36 : What is a motor?

A: A device that converts electrical energy to mechanical energy B: A device that converts mechanical energy to electrical energy C: A component that opposes electric current D: None

Q37 : What is the concept of dark age?

A: Period of universe without stars B: Period of universe with stars C: Both a & b D: None

Q38 : What is the concept of black hole?

A: Region with extremely strong gravity B: Region with extremely weak gravity C: Both a & b D: None

Q39 : What is the disadvantage of a series circuit?

A: If one component fails, the entire circuit is broken B: Components share the same current C: Components have different voltages D: None

Q40 : What is the Aufbau principle?

A: Electrons fill lowest energy levels first B: Electrons fill highest energy levels first C: Both a & b D: None

Q41 : 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

Q42 : What is the fuel used in a nuclear power plant?

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

Q43 : What is the relationship between voltage, current, and power?

A: P = VI B: P = V/I C: P = I/V D: None

Q44 : 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

Q45 : What is the equation for buoyancy in gases?

A: F_b = ρVg B: F_b = ρV/g C: F_b = ρg/V D: None

Q46 : Which planet has the most moons?

A: Jupiter B: Saturn C: Uranus D: None

Q47 : What is the binding energy per nucleon?

A: Total binding energy divided by the number of nucleons B: Total binding energy multiplied by the number of nucleons C: Mass defect divided by the number of nucleons D: Mass defect multiplied by the number of nucleons

Q48 : What is the center of our solar system?

A: Earth B: Sun C: Moon D: None

Q49 : What is the most common radioactive isotope used in medicine?

A: Carbon-14 B: Iodine-131 C: Technetium-99m D: Cobalt-60

Q50 : What is the Large Hadron Collider used for in cosmology?

A: To study the early universe B: To study dark matter C: To study dark energy D: None

Q51 : What is the name of the spacecraft that orbited Saturn?

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

Q52 : A resistor has a voltage of 5V and a resistance of 10Ω. What is its current?

A: 0.1A B: 0.5A C: 1A D: None

Q53 : What is the study of fluids at rest called?

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

Q54 : 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

Q55 : What is the advantage of a parallel circuit?

A: Components can be turned on/off independently B: Components share the same current C: Components have the same voltage D: None

Q56 : What is the advantage of a series circuit?

A: Components share the same current B: Components have different voltages C: Components can be turned on/off independently D: None

Q57 : What is gamma decay?

A: Emission of a gamma ray from a nucleus B: Emission of an alpha particle from a nucleus C: Emission of a beta particle from a nucleus D: Emission of an electron from a nucleus

Q58 : What is the boundary layer?

A: The layer of fluid near a surface where the velocity is zero B: The layer of fluid near a surface where the velocity is maximum C: The layer of fluid near a surface where the pressure is maximum D: The layer of fluid near a surface where the temperature is maximum

Q59 : What is the direction of voltage drop in KVL?

A: Clockwise is positive B: Counterclockwise is positive C: Either direction is acceptable D: None

Q60 : What is alpha decay?

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

Q61 : What are the two main types of fluids?

A: Liquids and gases B: Solids and liquids C: Gases and solids D: Plasmas and gases

Q62 : What is the difference between nuclear binding energy and chemical binding energy?

A: Nuclear binding energy is stronger than chemical binding energy B: Nuclear binding energy is weaker than chemical binding energy C: Nuclear binding energy is equal to chemical binding energy D: Nuclear binding energy is unrelated to chemical binding energy

Q63 : What is a generator?

A: A device that converts mechanical energy to electrical energy B: A device that converts electrical energy to mechanical energy C: A component that opposes electric current D: None

Q64 : What is the binding energy per nucleon of helium-4?

A: 7.1 MeV B: 5.5 MeV C: 4.5 MeV D: 3.5 MeV

Q65 : 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

Q66 : 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

Q67 : Which planet is known as the "Morning Star"?

A: Mercury B: Venus C: Mars D: None

Q68 : What is the shielding material for gamma radiation?

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

Q69 : Which planet is known as the "Red Planet"?

A: Earth B: Mars C: Jupiter D: None

Q70 : What is the unit of radiation dose?

A: Gray B: Sievert C: Becquerel D: Curie

Q71 : What is the Pauli exclusion principle?

A: No two electrons have same quantum numbers B: Two electrons have same quantum numbers C: Both a & b D: None

Q72 : What is the equation for pressure head?

A: h = P/ρg B: h = P ρg C: h = P/g D: None

Q73 : What is a resistor?

A: A component that opposes electric current B: A component that generates electricity C: A component that stores energy D: None

Q74 : What is the half-life of carbon-14?

A: 1000 years B: 5000 years C: 5730 years D: 10000 years

Q75 : What is the total resistance of a parallel circuit?

A: The reciprocal of the sum of reciprocals B: The sum of individual resistances C: The product of individual resistances D: None

Q76 : What is the binding energy of uranium-238?

A: 1801 MeV B: 7.6 MeV C: 6.4 MeV D: 5.2 MeV

Q77 : What is the ionization energy trend in a group?

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

Q78 : A 10Ω resistor and a 20Ω resistor are connected in series. What is the voltage across the 10Ω resistor if the battery voltage is 30V?

A: 10V B: 15V C: 20V D: None

Q79 : What is a short circuit?

A: An unintended path of low resistance B: An intended path of high resistance C: A component that generates electricity D: None

Q80 : What is a supernova?

A: An explosion of a star B: A collision of two galaxies C: A formation of a black hole D: None

Q81 : What is a transformer?

A: A device that increases or decreases voltage B: A device that generates electricity C: A component that opposes electric current D: None

Q82 : What is the pressure exerted by a fluid at equilibrium?

A: Dynamic pressure B: Static pressure C: Hydrostatic pressure D: None

Q83 : 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

Q84 : What is a star cluster?

A: A group of stars B: A group of galaxies C: A group of planets D: None

Q85 : What is the relationship between voltage, current, and power?

A: P = VI B: P = V/I C: P = I/V D: None

Q86 : What is the main component of the nucleus?

A: Protons and neutrons B: Electrons and protons C: Electrons and neutrons D: None

Q87 : Which planet has a highly eccentric orbit?

A: Mercury B: Mars C: Pluto D: None

Q88 : 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

Q89 : What is the unit of mass defect?

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

Q90 : What is the relationship between energy and power?

A: E = Pt B: E = P/t C: E = P + t D: None

Q91 : What is the Reynolds number used for?

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

Q92 : What is the charge of an electron?

A: Positive B: Negative C: Neutral D: None

Q93 : What is the concept of a closed universe?

A: A universe with a finite volume and no boundaries B: A universe with an infinite volume and no boundaries C: A universe with a finite volume and boundaries D: None

Q94 : What is the instrument used to measure atmospheric pressure?

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

Q95 : What is the number of electrons in a neutral atom?

A: Equal to atomic numbe B: Equal to mass number C: Both a & b D: None

Q96 : What is the most common type of ionizing radiation?

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

Q97 : What is the binding energy per nucleon of oxygen-16?

A: 7.98 MeV B: 7.5 MeV C: 6.5 MeV D: 5.5 MeV

Q98 : A circuit has a 10Ω resistor and a 20Ω resistor in parallel. What is the total power dissipated?

A: 10W B: 20W C: 60W D: None

Q99 : What is the difference between internal conversion and gamma decay?

A: Internal conversion involves the emission of an electron, gamma decay involves the emission of a gamma ray B: Internal conversion involves the emission of a gamma ray, gamma decay involves the emission of an electron C: Internal conversion is a physical change, gamma decay is a chemical change D: Internal conversion is a chemical change, gamma decay is a physical change

Q100 : What is the limitation of using KCL in circuit analysis?

A: Assumes ideal components B: Assumes lumped parameters C: Not applicable to high-frequency circuits D: All of the above

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