Class 12 Education Question Answer

Class 12 education question-answer guide covering all subjects like Physics, Chemistry, Mathematics, Biology, and more with simple answers for better understanding.

Class 12 Education Question Answer

Class 12 education is a crucial stage for students as it prepares them for higher studies and future careers. It covers essential subjects such as Physics, Chemistry, Mathematics, Biology, and more. This guide provides carefully chosen questions and answers for all subjects, helping students clarify concepts and excel in exams.

Physics

Question What is Newton’s second law of motion?

Answer Newton’s second law states that the rate of change of momentum of an object is directly proportional to the applied force and occurs in the direction of the force.

Question Define work in physics.

Answer Work is defined as the product of the force applied and the displacement of the object in the direction of the force.

Question What is the unit of power in the SI system?

Answer The unit of power in the SI system is the watt (W).

Question State Ohm’s law.

Answer Ohm’s law states that the current through a conductor is directly proportional to the voltage across it, provided the temperature remains constant.

Question What is the principle of conservation of energy?

Answer The principle of conservation of energy states that energy cannot be created or destroyed; it can only be transformed from one form to another.

Question Define electric field.

Answer An electric field is a region around a charged particle where a force is exerted on other charged particles.

Question What is meant by refraction of light?

Answer Refraction of light is the bending of light rays as they pass from one medium to another with a different refractive index.

Question Define centripetal force.

Answer Centripetal force is the force directed toward the center of a circular path, responsible for keeping an object in circular motion.

Question What is electromagnetic induction?

Answer Electromagnetic induction is the process of generating an electromotive force (emf) in a conductor when it is exposed to a changing magnetic field.

Question What is the difference between scalar and vector quantities?

Answer Scalar quantities have only magnitude, while vector quantities have both magnitude and direction.

Question Define moment of inertia.

Answer Moment of inertia is the resistance of a body to changes in its rotational motion about an axis.

Question What is the formula for kinetic energy?

Answer Kinetic energy (KE) is given by the formula: KE = 1/2 mv², where m is mass and v is velocity.

Question What is the speed of light in a vacuum?

Answer The speed of light in a vacuum is approximately 3 × 10⁸ m/s.

Question Define potential difference.

Answer Potential difference is the work done to move a unit charge from one point to another in an electric field.

Question What is the Doppler effect?

Answer The Doppler effect refers to the change in frequency or wavelength of a wave in relation to an observer moving relative to the source of the wave.

Question State Kepler’s first law of planetary motion.

Answer Kepler’s first law states that planets move in elliptical orbits with the Sun at one of the two foci.

Question What is a capacitor?

Answer A capacitor is an electrical component used to store energy in the form of an electric field.

Question Define escape velocity.

Answer Escape velocity is the minimum velocity required for an object to break free from the gravitational attraction of a planet.

Question What is meant by thermal equilibrium?

Answer Thermal equilibrium occurs when two objects in thermal contact have the same temperature and no heat flows between them.

Chemistry

Question What is the periodic table?

Answer The periodic table is an arrangement of elements in order of increasing atomic number, grouped based on similar chemical properties.

Question Define a chemical reaction.

Answer A chemical reaction is a process in which substances interact to form new substances with different properties.

Question What is an isotope?

Answer Isotopes are atoms of the same element with the same atomic number but different mass numbers.

Question What is Avogadro’s number?

Answer Avogadro’s number is 6.022 × 10²³ and represents the number of atoms or molecules in one mole of a substance.

Question Define molarity.

Answer Molarity is the number of moles of solute dissolved in one liter of solution.

Question What is photosynthesis?

Answer Photosynthesis is the process by which green plants use sunlight, carbon dioxide, and water to produce glucose and oxygen.

Question What are the types of RNA?

Answer The three main types of RNA are messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA).

Question Define biodiversity.

Answer Biodiversity refers to the variety and variability of life forms, including species, ecosystems, and genetic diversity.

Question What is osmosis?

Answer Osmosis is the movement of water molecules across a semipermeable membrane from a region of lower solute concentration to higher concentration.

Question What is the function of the mitochondria?

Answer Mitochondria are the powerhouse of the cell, generating energy in the form of ATP through cellular respiration.

Question What are enzymes?

Answer Enzymes are biological catalysts that speed up chemical reactions in living organisms.

Question What is the difference between mitosis and meiosis?

Answer Mitosis is a type of cell division resulting in two identical daughter cells, while meiosis produces four genetically diverse gametes.

Question Define an ecosystem.

Answer An ecosystem is a community of living organisms interacting with their physical environment.

Question What is genetic engineering?

Answer Genetic engineering is the manipulation of an organism’s DNA to introduce or modify specific traits.

Question What is the human genome project?

Answer The human genome project is an international research initiative aimed at mapping and understanding all the genes of the human species.

This expanded content continues with the same depth and breadth for other Class 12 subjects like English, Economics, History, and more if needed. Let me know if you’d like to add even more subjects or refine any part!