This quiz works best with JavaScript enabled. Home > Science > Physics > Physics – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Physics Quiz 7 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Device that stores energy by having 2 oppositely charged plate. A) Capacitors. B) Capacitance. C) Capacitance in Parallel. D) Capacitance in Series. Show Answer Correct Answer: A) Capacitors. 2. Which is the correct equation for calculating the speed of a wave? A) T = 1/f. B) Speed= Wavelength x Period. C) Speed = Wavelength/Frequency. D) Speed= Wavelength x Frequency. Show Answer Correct Answer: D) Speed= Wavelength x Frequency. 3. A force acts on an area to produce a pressure.Which changes produce the same pressure? A) Double the area and double the force. B) Double the area and halve the force. C) Double the area and make the force four times bigger. D) Halve the area and double the force. Show Answer Correct Answer: A) Double the area and double the force. 4. Sudden fall in barometer is indication of A) Tide. B) Rain. C) Storm. D) Clear weather. Show Answer Correct Answer: C) Storm. 5. What is a contact force? A) A force that involves objects physically touching. B) A force that involves objects being very close. C) A force that involves objects that are not physically touching. D) None of above. Show Answer Correct Answer: A) A force that involves objects physically touching. 6. Power is defined as the A) Force on an object times the distance the object moves. B) Force on an object divided by the time the force acts. C) Work done times the time taken to do that work. D) Work done on an object divided by the time to do the work. Show Answer Correct Answer: D) Work done on an object divided by the time to do the work. 7. Centimeters is ..... meters? A) 0.5 meters. B) 5 meters. C) 50 meters. D) 2 meters. Show Answer Correct Answer: A) 0.5 meters. 8. When capacitors in parallel (3 capacitors), the equivalent capacitance is A) C = C1 + C2 + C3. B) C = 1/C1 + 1/C2 + 1/C3. C) C = QV1 + QV2 + QV3. D) C = QV1 + QV2 + QV3. Show Answer Correct Answer: A) C = C1 + C2 + C3. 9. $ \frac{\sum_{ }^{ }x}{n}=\overline{x}$ is used to determine ..... A) Average. B) Percent Error. C) Accuracy. D) Percent Error. Show Answer Correct Answer: A) Average. 10. In a perfectly inelastic collision, a ball dropped from a certain height would bounce A) At a greater height. B) At the same height. C) At a lesser height. D) Would stick to the floor. Show Answer Correct Answer: D) Would stick to the floor. 11. The boiling point of a given liquid varies A) Inversely with pressure. B) Directly with pressure. C) Directly with density. D) None of above. Show Answer Correct Answer: B) Directly with pressure. 12. Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit A) X-rays. B) Visible light. C) Radio waves. D) Ultraviolet light. Show Answer Correct Answer: B) Visible light. 13. Conductors have ..... electrons in their last orbit ring. A) 1-3. B) 4. C) 5-8. D) 0. Show Answer Correct Answer: C) 5-8. 14. If a cat has a initial time of 0s, and an initial distance of 0s. Later it has a final time of 50 s, and a final distance of 70 m. What is the velocity? A) 1.4 m/s. B) 0.714 m/s. C) 1.142 m/s. D) None of above. Show Answer Correct Answer: A) 1.4 m/s. 15. The time period of a simple pendulum of length 1 m is A) 1 sec. B) 2 sec. C) 3 sec. D) 4sec. Show Answer Correct Answer: B) 2 sec. 16. M is equal to A) 1cm. B) 1m. C) 1dm. D) 10cm. Show Answer Correct Answer: A) 1cm. 17. A train begins a journey from a station and travels 60 km in a time of 20 minutes. What is the average speed of the train? A) 3.0 m / s. B) 5.0 m / s. C) 50 m / s. D) 60 m / s. Show Answer Correct Answer: C) 50 m / s. 18. Suppose you are rotating in a chair with 2 equal masses held in each outstretched hand and you drop them. What happens to your angular velocity? A) Increase. B) Decrease. C) Stays the same. D) Is lost. Show Answer Correct Answer: C) Stays the same. 19. The following light wave that has the longest wavelength is A) Violet. B) Blue. C) Green. D) Red. Show Answer Correct Answer: D) Red. 20. A bowling ball is dropped in a vacuum chamber. As it falls, the acceleration of the bowling ball A) Decreases. B) Increases. C) Remains the same. D) None of above. Show Answer Correct Answer: C) Remains the same. ← PreviousNext →Related QuizzesScience QuizzesPhysics Quiz 1Physics Quiz 2Physics Quiz 3Physics Quiz 4Physics Quiz 5Physics Quiz 6Physics Quiz 8Physics Quiz 9Physics Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books