Chapter 3. 3. WORK, POWER AND, ENERGY. 3.1. WORK, ELECTRICAL POWER, MECHANICAL POWER, AND ENERGY. MCQs

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1. . Product of force and distance is called:





2. . Trade unit of electrical energy:





3. . If a 100W lamp is burned for 15 hours, the energy consumed is:





4. . A potential difference of 20V is applied across a resistor of 2.5 ohms. The power will be:





5. . The unit of work is the joule. Another physical quantity with the same unit is:





6. . Energy in the form of heat and light is obtained from:





7. . A bullet fired from a gun can pierce a target due to its:





8. . A capacitor stores which type of energy?





9. . Formula of work done:





10. . Which of the following is not an expression of power?





11. . The SI unit of power is:





12. . The SI unit of work is:





13. . The rate of doing work is called:





14. . The capacity of doing work is called:





15. . The unit of electrical power is:





16. . Three hundred joules of energy are consumed in 15 s. The power is:





17. . Watt is equal to:





18. . B.T.U stands for:





19. . One kilo calorie is equal to:





20. . Efficiency is the ratio of:





21. . Thermal efficiency is the ratio of:





22. . Electrical energy bill is calculated with:





23. . One Horse Power (HP) = _______ Watt:





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