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Physics Quiz 21 (25 MCQs)

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1. What is represented by the area under a force-displacement graph?
2. Natural radioactivity was discovered by
3. A ray of light passing through the focal point at an angle to the optic axis of a concave mirror is reflected back
4. It is the energy stored in objects that can be stretched or compressed
5. Metric ton= _____ quintal
6. How can you tell one form of electromagnetic energy from another?
7. An object moving in the +x direction experiences an acceleration of +2.0 m/s2. This means the object
8. What is the unit used to express the magnitude of an object's ability to store electric charge?
9. What is the gradient of a line on a velocity time graph an indicate?
10. Which law states, "The radiant energy emitted by a black body per unit area per unit time is directly proportional to the fourth power of its absolute temperature" .
11. The unit of surface tension is
12. These are used to control the amount of current.
13. Which equation defines Elastic Potential Energy?
14. What does a horizontal line on a velocity-time graph indicate?
15. Which of the following is the area under the line of acceleration vs time graph?
16. In which of the following industries is mica as a raw material?
17. Which device is used to measure weight?
18. It can be used to make a new unit larger or smaller than the base unit
19. Where would time run the slowest?
20. Three resistors connected in parallel each carry currents labeled I1, I2 and I3. Which of the following expresses the value of the total current IT in the combined system?
21. A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?
22. In the absence of air resistance, objects fall at constant
23. What is the formula for ohms law?
24. Which of the following is TRUE about electric charge?
25. Sound waves in air are
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