28/03/2020Electrical 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. You have fuses instead of breakers in your house. One is blown. How do you know it's an overload, and not a short circuit?The fuse is totally meltedThe glass is blackened out.The glass on the fuse is brokenThe filament is broken inside the fuse2. Switching surge isShort duration transient voltageHyperbolically dying voltage.High voltage dcHigh voltage ac3. By design, wires with the highest resistance are built into ...Clockstelephonesstereo speakerstoasters4. A current needs a path to flow along, also known as aResistorCircuitPower source5. What is static electricity caused by?A balance of positive and negative chargesA balance of powerAn imbalance of positive and negative charges6. The circuit breaker in a typical household light circuit is rated for how many amps?22,000202007. Which type of fire extinguisher should be used to put out an electrical fire?Class DClass AClass BClass C8. Reaction to static electric shock may cause injury.FalseTrue9. What is the symbol of a bulb?A circle with an xA rectangleOne big and one small line10. A/An _____________________ is used to turn the electricity in a current on or offBatterySwitchInsulatorConductor11. Conductive articles of jewelry and clothing may be worn around exposed energized parts.FalseTrue12. If you connect a wire with 18 Ω of resistance to a batter, and measure the current to be 10 A, what is the voltage of the battery?90 A180 V18 Ω240 V13. Minimum insulation resistance value recommended for LV machines as1M Ohm/1000V2M Ohm/1000V1000K Ohm/1000VACA&C14. Which of the following cause injuries?Battery chemicalsPrinted Circuit board etching materialsSmoke from burning or metal componentsAll of the above15. If the current equals to 14 A and the resistance is 3 Ω, what is the voltage of the battery?4.66 V10 A42 V3 V16. If the resistance in the circuit is 10 Ω and the current is 3 A, what is the voltage of the battery?3.33 V10 A3 V30 V17. Additional earthing can be connected local to work:It is a mandatory requirementFor extra confidence and operator safetyFor the protection of the equipment from experiencing any accidently applied18. The Insulation resistance value of a machine falls.....At low temperatureAt high temperatureAt both low and high temperature both19. Which of the following describes a series circuit?Current flows along each branchBulbs are all in a loopIf one bulb breaks the other one still works20. If the voltage is 12 V and the resistance in the wire is 3 Ω, what is the the current in the circuit?4 A2 A6 A12 A21. Which of the following is NOT a good conductor?PlasticIronCopper22. Which of the following describes a parallel circuit?Current flows along each branchAll bulbs light up togetherIf one bulb breaks the circuit is broken23. What is current electricity?Energy stored within an item, that it then releasedContinuous flow of electrons in a circuitA charge that is built up then dispersed24. The medium employed for the extinction of arc in air circuit breaker is OilSF6AirWater25. What device opens and closes an electric circuit?A switchA power sourceA load26 out of 25Time is Up!
