28. How can water from the deep well move upward? Como
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A. It occurs naturally.
B. It uses water pump.
C. It is a spontaneous process. D. It flows from higher temperature to cooler temperature.
29. What causes thermal pollution?
A. Exhaust of different vehicles. B. Exhaust from different industrial engines. C. Degradation of water. D. All of them
30. What causes thermal pollution?
wone zagnani
A. Exhaust of different vehicles. B. Exhaust from different industrial engines. C. Degradation of water. D. All of them
31. In which of the following units is electrical consumption measured by electric companies four our household
consumption in our homes? a. kilowatt b. volt
c. megawatt d. kilowatt hour
32. In power stations generating electricity, power is measured in
a. joule
b. kilojoule c. kilowatt ladh d. megawattens
33. Transformers are used to raise the voltage along substations and lower it for residential consumption. What kind of
transformers is used to raise the voltage?
a. step-up b. step-down c. neither of the two d. both
34. Shayne turned on a lamp switch in her room. Which of the following is the correct path of electrical power that can
be traced back to the source?
a. power plant transmission substations
distribution substations
residences
b. transmission substations
power plants -
residences - distribution substations
C. residences
distribution substations
power plants - transmission substations
d. distribution substations
transmission substations
power plants
residences
35. Who among the following scientists discovered the relationship between electricity and magnetism?
a. Andrei Marie Ampere
b. Hans Christian Oersted c. Michael Faraday d. Alessandro Volta
36. What energy transformation takes place in a generator?
a. electrical to mechanical b. mechanical to electrical c. heat to mechanical d. chemical to mechanical
37. If a 100 w light bulb is lit for 8 hours each day for 20 days in a month. How many kilowatt-hours will the bulb
consume?
b. 160
d. 16000
38. To reduce your electric bill
a. make use of limited appliances b. put off appliances when not in use
c. put off main switch during the day d. connect appliances in series
39. All of the following power plants use steam to drive the turbines to produce electricity except
a. hydropower b. geothermal
c. coal-fired
d. nuclear
40. A 60 watt bulb is connected to 120V plug. What is the current in the lighted bulb?
a. 0.25 A b. 0.5 A
c. 2 A
d. 4 A
C. 1600
a. 16​