1. . Product of force and distance is called:
(A) Power
(B) Work done
(C) Speed
(D) Velocity
2. . Trade unit of electrical energy:
(A) KWH
(B) WH
(C) H.P
(D) B.H.P
3. . If a 100W lamp is burned for 15 hours, the energy consumed is:
(A) 0.5 unit
(B) 1.5 unit
(C) 6.67 unit
(D) 15 unit
4. . A potential difference of 20V is applied across a resistor of 2.5 ohms. The power will be:
(A) 170 watts
(B) 180 watts
(C) 190 watts
(D) 160 watts
5. . The unit of work is the joule. Another physical quantity with the same unit is:
(A) Power
(B) Velocity
(C) Energy
(D) Force
6. . Energy in the form of heat and light is obtained from:
(A) Biomass
(B) Fossil fuels
(C) Sun
(D) Wind
7. . A bullet fired from a gun can pierce a target due to its:
(A) Mechanical energy
(B) Heat energy
(C) Kinetic energy
(D) Acceleration
8. . A capacitor stores which type of energy?
(A) Kinetic energy
(B) Vibrational energy
(C) Potential energy
(D) Heat energy
9. . Formula of work done:
(A) Work done = force × displacement
(B) Work done = force × velocity
(C) Work done = pressure × displacement
(D) Work done = mass × acceleration
10. . Which of the following is not an expression of power?
(A) P = VI
(B) P = I²R
(C) P = V²/R
(D) P = I/R
11. . The SI unit of power is:
(A) kW (kilo-watt)
(B) J/s (joules per second)
(C) Ws (watt-second)
(D) J/h (joules per hour)
12. . The SI unit of work is:
(A) Joule
(B) Volt
(C) g/cm
(D) Watt
13. . The rate of doing work is called:
(A) Power
(B) Energy
(C) Watt
(D) Current
14. . The capacity of doing work is called:
(A) Power
(B) Energy
(C) Watt
(D) Current
15. . The unit of electrical power is:
(A) Volt
(B) Coulomb
(C) Watt
(D) Current
16. . Three hundred joules of energy are consumed in 15 s. The power is:
(A) 2,000 W
(B) 2 W
(C) 20 W
(D) 200 W
17. . Watt is equal to:
(A) Joule per second
(B) Meter per second
(C) Ampere per second
(D) Farad per second
18. . B.T.U stands for:
(A) British Thermal Unit
(B) Big Thermal Unit
(C) Both Thermal Unit
(D) Bit Thermal Unit
19. . One kilo calorie is equal to:
(A) 3187 J
(B) 4100 J
(C) 4187 J
(D) 1 B.T.U
20. . Efficiency is the ratio of:
(A) Input / Output
(B) Output / Input
(C) Output / Losses
(D) Input / Losses
21. . Thermal efficiency is the ratio of:
(A) Heat actually utilized / Total heat produced electrically
(B) Total heat produced electrically / Heat actually utilized
(C) Heat actually utilized × Total heat produced electrically
(D) None of them
22. . Electrical energy bill is calculated with:
(A) kWh × Rate/unit
(B) Wh × Rate/unit
(C) W sec × Rate/unit
(D) kW × Rate/unit
23. . One Horse Power (HP) = _______ Watt:
(A) 646
(B) 764
(C) 746
(D) 546