29/03/2020 D.C Circuits(Senior Class Physics Study by Topics) 0Comments by Gate Academy Welcome to your D.C Circuits(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. Given a dc voltage source of 3.5 kV and a circuit resistance of 220 Ω, what is the current? 16 mA6.3 A6.3 mANone of the above2. Which switch rotates on a shaft? SlidePush ButtonRotaryToggle3. Which of the following IS NOT a typical indication of an overload condition? "OL" for overloadThe display shows 0Flashing LIghts"E" for error4. One joule of work is required to move one coulomb of charge from one point to another with no change in the velocity of the charged particles. Which of the following is true between the two points?The potential difference is one volt.he resistance is one ohm.The electric field strength is one volt/meterThe current is one ampere.5. The rated emf (voltage) of a battery is 12 volts. When the battery delivers a current of 0.5 A to a load, the potential difference between the terminals of the battery is 10 V. The internal resistance of the battery is4 ohms2 ohms1 ohm1/2 ohm6. There is a circuit with an emf source of 6.0V connected to a lamp and a current flow of 2.0A. Assuming that the wires connecting the whole circuit is resistance free, what is the resistence of the lamp?2.0Ω3.0Ω0Ω6.0Ω7. What keeps an electron in orbit around the nucleus?More electrons than protonsElectrostatic force and electrons spinningLess protons than electronsElectrostatice force and protons spinning8. Potential difference between ends of conductor maintained by the battery isconstantonezerodifferent9. In a series circuit the _______________ is always the same CurrentResistanceVoltagePower10. If you replace a wire resistor with another of the same material and length but with three times the diameter, the resistance is now:3 times that of the original resistor1/9 that of the original resistor1/3 that of the original resistor9 times that of the original resistor11. The basic measurement of resistance isOhmWattAmpVolt12. What type of circuit combines one or more series circuits with one or more parallel circuits?Series-parallelParallelSimpleSeries13. An immersion heater of resistance R converts electrical energy into thermal energy that heats the fluid in which it is immersed. If the current in the heater is I, the thermal energy transferred in time t isIRt^2IRtIR^2tI^2Rt14. What would cause a component to drop the applied voltage? A ShortAn increase in ValueAn openA decrease in value15. What would be the expected output component for a radio receiver? Tuning knobSpeakerVolume controlAntenna16. A source delivers 12 V and the current is 777 mA. Then the best expression for the resistance is9.3 Ω15 Ω9.32 Ω15.4 Ω17. Suppose you have three resistors in parallel, each with a value of 68,000 Ω. Then the total resistance is 23 Ω0.2 MΩ204 Ω23 KΩ18. Four resistors are connected in series, each with a value of 4.0 KΩ. The total resistance is16 KΩ1 KΩ8 KΩ4 KΩ19. A variable resistor is connected across a constant voltage source. Which of the graphs represents the power P dissipated by the resistor as a function if its resistance R?CBADE20. What is the P.D of each resistor?4V,8V24A,48A4A,8A24V,48V21. The flow of electricity in a circuit is based on the flow of ElectronsNucleiAtomsNeutrons22. What material is affected most by flux lines?AluminumGlassWoodSteel23. A high‑voltage transmission line carries 1000 A at 700,000 V. What is the maximum power carried in the line?700 GW700 MW1.43 kw700 kW24. In the circuit shown below, the capacitor C is first charged by throwing switch S to the left, then discharged by throwing switch S to the right. The time constant for discharge could be increased by which of the following?placing another capacitor in series with Cplacing another capacitor in parallel with CIncreasing the battery emf (voltage) εplacing another resistor in parallel with the resistor R25. Good engineering practice usually requires that a series-parallel resistive network be made:From a series combination of resistors in parallelFrom resistors that are all very ruggedFrom a parallel combination of resistors in seriesFrom resistors that are all the same26 out of 25Time is Up!
