Which law relates voltage and current? A. Faraday’s B. Ohm’s C. Newton’s D. Coulomb’s Explanation: V = IR.
Which quantity is scalar? A. Velocity B. Force C. Acceleration D. Energy Explanation: Energy has magnitude only.
Which particle has positive charge? A. Electron B. Proton C. Neutron D. Photon Explanation: Proton carries +1 charge.
Which law conserves charge? A. Newton’s law B. Ohm’s law C. Kirchhoff’s law D. Boyle’s law Explanation: Kirchhoff’s laws conserve current and charge.
Which force is weakest? A. Strong B. Electromagnetic C. Weak D. Gravitational Explanation: Gravity is weakest fundamental force.
Which wave travels fastest? A. Sound in air B. Light in vacuum C. Water wave D. Seismic wave Explanation: Light travels fastest in vacuum.
Which layer is closest to Earth? A. Stratosphere B. Mesosphere C. Troposphere D. Thermosphere Explanation: Troposphere is lowest layer.
Which gas causes acid rain? A. CO₂ B. SO₂ C. O₂ D. N₂ Explanation: SO₂ forms sulfuric acid in atmosphere.
Which process forms fossil fuels? A. Rapid cooling B. Long-term decomposition under pressure C. Evaporation D. Condensation Explanation: Organic matter transforms over millions of years.
Which nutrient is main energy source? A. Protein B. Fat C. Carbohydrate D. Vitamin Explanation: Carbohydrates are primary energy source.