28/03/2020 Electrical Circuits and Dangers of Electricity(Senior Class Physics Study by Topics) 0Comments by Gate Academy Welcome to your Electrical Circuits and Dangers of Electricity(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. What type of circuit do we find in our houses?SeriesParallel2. In which circumstances are contact with electricity most likely to be harmful.Using a faulty 240Vac power tool with RCDUsing a faulty 110V ac power tool in a damp environmentTouching a 24 V dc battery terminal with hand.3. Insulation and vibration testing are part of ..... Break down maintenanceCondition monitoringPlanned maintenance4. This is the circuit symbol for which piece of electrical equipment? A switchA cellA batteryA wire5. A single battery is called a ----? cellcurrentcircuitvoltage6. Which of the following describes a parallel circuit?If one bulb breaks the circuit is brokenAll bulbs light up togetherCurrent flows along each branch7. Which of the following is NOT a good conductor? CopperPlasticIron8. What is current electricity? Continuous flow of electrons in a circuitEnergy stored within an item, that it then releasedA charge that is built up then dispersed9. Why do we coat wires with plastic or rubber? Because those materials look nicer than copper wireBecause those materials are good insulatorsBecause they are flexible10. If your heart stops, doctors can start it again by using aDefibrillatorPacemakerElectric shocker11. Safety-related work practices involve: Keeping proper distance from overhead power linesThe use of ground fault circuit interruptersAll of the aboveVerifying power is off before doing repairs12. The Insulation resistance value of a machine falls..... At high temperatureAt both low and high temperature bothAt low temperature13. What is the resistance in the circuit that is connected to a 63 V battery, and is measured to have a current of 9 A.657 Ω7 Ω10 A63 Ω14. If the current equals to 14 A and the resistance is 3 Ω, what is the voltage of the battery?42 V3 V10 A4.66 V15. In the picture, what does the short line represent? Proton portion of cellA batteryElectron portion of batteryElectron portion of cell16. When you attach a battery to an electric light bulb, what process makes the bulb light up? Chemicals moving from the battery through the wireProtons flowing from the battery into the bulbElectrons flowing through the circuit17. An extension cord with a small cut in the outer insulation is okay to use because the internal insulation is not damaged. TrueFalse18. Current is the amount of energy provided by the circuit, increasing this made the electrons travel faster. FalseTrue19. If the voltage of the battery is 5 V and the resistance in the circuit is 2.5 Ω. What is the current? 50 V2 A12.5 A2.5 A20. The smoke detector Ion Chambers should never be disposed of by crushing or burning (incinerating) because these contain: Radioactive materialExplosive material.Non-ionizing radiation source.21. Which of the following gas has been used as insulating medium in electrical appliances?Sulphur hexafluorideFreon.NitrogenCarbon dioxide22. A current needs a path to flow along, also known as aPower sourceCircuitResistor23. Which of the following is NOT a good insulator?GlassPlasticIron24. Electric energy is produced by the________of charges.CessationcombinationSeparationAmalgamation25. Which of these materials is a good conductor? PlasticWoolGold26 out of 25Time is Up!
