28/03/2020 Current Electricity and Electrical Quantities(Senior Class Physics Study by Topics) 0Comments by Gate Academy Welcome to your Current Electricity and Electrical Quantities(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. Lead acid batteries provides a voltage difference of ___ volts.122015102. What do we call the materials which electricity can flow through easilyResistorsConductorsInsulators3. If electrons can flow through a substance, we say the material is a conductor.FalseTrue4. What is the unit for energy?OhmsVoltsJoulesAmperes5. What if a bird sat on a power line that was very close to the ground, placing one foot on the wire and one foot on the ground?The bird's feet are insulated, so it doesn't matter what it touchesThe bird would experience a voltage difference between the wire and the ground and would get friedNo current would flow through the bird, so nothing would happen6. Two wires P and Q, each of the same length and the same material, are connected in parallel to a battery. The diameter of P is half of that of Q.What fraction of the total current passes through P?0.330.200.250.507. What is current? The newness of a battery or resistorSomething that blocks or slows the flow of electronsThe flow of charges, usually in the form of electronsThe potential energy stored in a battery8. What do the stripes indicate?Amount of resistanceAmount of voltageAmount of energyAmount of current9. Electricity is the flow of tiny subatomic particles called....ElectronsElectrolytesEctronsElectrodes10. Contains two connected plates made of different metals or metallic compounds in a conducting solution. Wet cell batteryLead-Acid batteryDry cell battery11. If R1 and R2 are the filament resistances of 200 watt and a 100 watt bulb respectively, both designed to run at the same voltage, thenR1 is two times 3R2R2 is four times R1R2 is two times R1R1 is four times R212. A 60 ohm heater is used in a car heating system. If a potential difference of 12V is applied, what is the current that flows through the heater.48A0.2A72A5A13. What is the unit for current? AmperesJoulesVoltsOhms14. A __________ is a closed path or loop around which an electric current flows.Current electricityBatteryCircuitElectron15. The current in the arm CD of the circuit will beI1 + i3I1 – i2 + i3I2 + I3I1 + i216. If the length of a copper wire has a certain resistance R, then on doubling the length its specific resistanceWill be doubledWill become 1/4 thWill become 4 timesWill remain the same17. A _____ can provide the voltage difference that is needed to keep current flowing in a circuit. BatteryCurrentElectrodeChemical18. A current needs a path to flow along, also known as aPower sourceResistorCircuit19. ________ conducts electricity. PlasticsWireBatteriesLight bulbs20. A certain steam iron carries a current of 6.4 A when connected to a 120 V source. What is the resistance of the steam iron? 768 Ω0.05 Ω1.875 Ω18.75 Ω21. In the Bohr's model of hydrogen atom, the electron moves around the nucleus in circular orbit of radius 5 ⤬ 10–11 m. Its time period is 1.5 ⤬ 10–16 s. The current associated with electron motion is0.17 AZero1.07 ⤬ 10–3 A1.6 ⤬ 10–19 A22. A closed path that electric current follows is?ResistanceElectric CircuitsVoltage DifferenceBatteries23. There are four places that must be connected on the battery and bulb in order for the bulb to light.FalseTrue24. What is static electricity caused by?A balance of powerA balance of positive and negative chargesAn imbalance of positive and negative charges25. Which of the following MUST a circuit have? A battery and a lampWires and a lampWires and a power source and another componentComponents and wires26 out of 25Time is Up!
