This quiz works best with JavaScript enabled. Home > General Knowledge > Science > Physics > Physics Basics > Physics – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Physics Quiz 17 (2 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In a vacuum tube, the high voltage across anode and cathode used to A) Accelerate electrons with a high speed. B) Produce narrow beam electrons. C) Control the number of electrons. D) Control the fialament temperature. Show Answer Correct Answer: A) Accelerate electrons with a high speed. 2. Alternative Energy Sources A) Reusing rain water (grey water) to water plants. B) Recycling paper. C) Replace or supplement traditional fossil-fuel sources. D) Using scrubbers when burning coal to reduce toxic emissions. Show Answer Correct Answer: C) Replace or supplement traditional fossil-fuel sources. ← PreviousRelated QuizzesPhysics QuizzesScience QuizzesPhysics Quiz 1Physics Quiz 2Physics Quiz 3Physics Quiz 4Physics Quiz 5Physics Quiz 6Physics Quiz 7Physics Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books