Class 12 Physics Important Questions
Here are the most important questions from Class 12 Physics for board exam preparation. Students can practice these to score better. Q1: A particle moves with acceleration a = 2 m/s². Find velocity after 5s if initial velocity u = 0. Answer: v = u + at = 0 + 2*5 = 10 m/s Q2: State Ohm’s Law. Answer: Current through a conductor is directly proportional to voltage across the conductor and inversely proportional to resistance, V = IR. Q3: Define Newton's second law of motion. Answer: Force on an object is equal to the mass times its acceleration, F = ma. Q4: The potential energy of a mass m at height h is? Answer: PE = mgh Q5: Speed of light in vacuum? Answer: c = 3 × 10^8 m/s Q6: State the work-energy theorem. Answer: The work done on an object is equal to the change in its kinetic energy. Q7: Define electric current. Answer: Rate of flow of charge through a conductor. Q8: Ohm’s law formula for resistance R? Answer: R = V/I Q9: Formula for kinetic energy. Answer: KE = ½ mv² Q10: Unit...