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. According to Faraday's law of electrolysis, when a current is passed, the mass of ions deposited at the cathode is independent ofTimeCurrentChargeResistance2. A wire of uniform cross-sectional area has a resistance R. The wire is stretched until its length increases by 10%. By assuming that the new wire has the same volume as before, the resistance of the new wire is1.1 R0.9 R1.2 R1.0 R3. Why can birds sit on a power line?Because both feet are on the same voltage line, so there is no potential difference, so current does not flow through the birdBecause the wire is in the air and air has infinite resistance so no current flows through the wireBecause birds' feet are insulated so current is not conducted through themBecause birds have minimal resistance compared to household electronics, so current is diverted to the houses instead4. Given three resistors, how many different combinations of these three resistances can be madeFourThreeFiveSix5. Electricity is the flow of tiny subatomic particles called....ElectronsElectrodesEctronsElectrolytes6. A cell consists of two electrodes surrounded by a material called an ________.ElectricityElectrodeElectrolyteElectronic7. Current flows as long as there is a closed path that connects one battery terminal to the other battery terminal.FalseTrue8. The electrolyte enables charges to move from one electrode to the other.FalseTrue9. A _____ can provide the voltage difference that is needed to keep current flowing in a circuit. ChemicalCurrentElectrodeBattery10. Which of these is the equation for Ohm's Law?V = IRW = FdPE = mghR = IV11. 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 isZero1.07 ⤬ 10–3 A1.6 ⤬ 10–19 A0.17 A12. What happens to two terminals of a dry-cell battery connected in a circuit involving zinc and several chemicals in the pasteProtons are transferred between some of the compounds in this chemical reaction.The chemical reaction in each cell provides a voltage differenceElectrons are transferred between some of the compounds in this chemical reactionNeutrons are transferred between some of the compounds in this chemical reaction.13. An oscilloscope is a device that is used to generate different waveforms.TrueFalse14. The current in a circuit equals the voltage difference divided by the resistance.Ohms LawLaw of complianceLaw of resistanceConductivity Law15. The bulbs A, B and C are connected as shown in Figure. The bulbs B and C are identical. If the bulb C is fused, Both A and B will glow less brightly,A will glow more brightly and B will glow less brightly.Both A and B will glow more brighty,A will glow less brightly and B will glow more brightly,16. In a copper voltameter, mass deposited in thirty seconds is m grams. If the time current graph is as shown in figure. E.C.E. of copper is (current in milli ampere)N0.6 m0.5 m0.1 m17. ________ conducts electricity. PlasticsLight bulbsBatteriesWire18. A __________ is a closed path or loop around which an electric current flows.Current electricityBatteryElectronCircuit19. The quantity that has the same unit as e.m.f is Potential differencePowerCurrentForce20. A toaster operating at 240V has a resistance of 120Ω. The power is240 W480 W2 W400 W21. Two resistors are connected in series. If the resistors are 20 ohms and 30 ohms the total resistance of the circuit is 0.67 ohms50 ohms1.5 ohms10 ohms22. A 100 W bulb B1 and two 60 W bulb B2 and B3 are connected to a 250V source as shown in the Figure. Now W1, W2 and W3 are the output powers of the bulbs B1, B2 and B3 respectively. ThenW1 < W2 < W3W1 > W2 = W3W1 < W2 = W3W1 > W2 = W323. What is the unit for energy?JoulesOhmsAmperesVolts24. The resistance of a hotplate is 48 Ω. How much current does the plate carry when connected to a 120-V source? 120 A2.5 A5760 A0.4 A25. Wet cell batteries contain electrolytes which contains the least amount of paste chemicals.TrueFalse26 out of 25Time is Up!