MODULE 4: ELECTRICITY AND MAGNETISM
Quiz by Joel Managbanag
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20 questions
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- Q1In which of the following units is electrical consumption measured by electric companies four our household consumption in our homes?voltkilowattmegawattKilowatt hour30s
- Q2In power stations generating electricity, power is measured in _________.kilowattMegawattkilojouleJoule30s
- Q3Why do power stations generate AC, and not DC?Transformers work with AC.AC is used in mobile devices and gadgets.It is easier to generate, safer and more economical to transmit AC than DC.AC is more efficient and economical.30s
- Q4Transformers are used to raise the voltage along substations and lower it for residential consumption. What kind of transformers is used to raise the voltage?Neither of the twoStep-downStep-upBoth30s
- Q5Shayne 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?transmission substations to power plants to residences to distribution substationsresidences to distribution substations to power plants to transmission substationsdistribution substations to transmission substations to power plants to residencespower plant to transmission substations to distribution substations to residences30s
- Q6Who among the following scientists discovered the relationship between electricity and magnetism?Andrei Marie AmpereHans Christian OerstedMichael FaradayAlessandro Volta30s
- Q7You made an electric motor in school. When you tested it in using 4 dry cells, the armature turned very fast. What should you do to make it turn slower?use a bigger magnetRemove one of the dry cellsincrease the number of turns in the coil of wiredecrease the distance between the magnetic poles30s
- Q8What energy transformation takes place in a generator?heat to mechanicalMechanical to electricalchemical to mechanicalelectrical to mechanical30s
- Q9In which case will electric current be induced in a coil of wire?When a magnet is held stationary inside the coilWhen a magnet is rapidly inserted into and out of the coilWhen a magnetic compass is held beside itWhen it is connected to a galvanometer30s
- Q10If 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?16 Kilowatt-hour60s
- Q11Last month, Ms. Alcantara’s electric meter reads 8765 kWh. How much will she pay for power generation if the charge of electric company per kWh is 6.88 pesos and her electric meter reads 9975 this month?P 8,324.80120s
- Q12Jaypeth paid ₱1250.00 for electric bill. How much energy (in kWh) is consumed if the electric company charges ₱6.88/kWh?P 181.69120s
- Q13How is the energy efficiency ratio (EEF) related to the operating cost?. the higher the EEF, the higher the operating costthe lower the EEF, the higher the operating costthe higher the EEF, the lower the operating costthe lower the EEF, the lower the operating cost120s
- Q14Gemma wanted to improve the lighting condition of her room by buying a lamp. What suggestions can you give her and why?Buy an incandescent bulb because it gives off more light.Buy an incandescent bulb because it is cheaper.Buy a fluorescent lamp because it is brighter than an incandescent bulb.Buy a compact fluorescent lamp (CFL) or LED lamp because it is more energy efficient.120s
- Q15A 60 watt bulb is connected to 120V plug. What is the current in the lighted bulb?0.5 A120s