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. An electrostatic discharge passing throuh an ESD could cause catastrophic failure, major electrical characteristic changes, or performance degradation in the deviceTrueFalse2. The current through the potentiometer is 17 mA and its value is 1.22KΩ. The power is20.7 mW0.24 μW20.7 W350 mW3. 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?EBCDA4. 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 is2 ohms1/2 ohm4 ohms1 ohm5. What causes an overload condition when you are measuring resistance?Range switch set to low for resistance to be measuredRange switch set to high for resistance to be measuredIncorrect function selected for value being measuredTest leads connected to multimeter incorrectly6. Effect that is not produced by current ischemical effectmagnetic effectheating effectcontraction effect7. What causes an overload condition?Test leads connected to multimete incorrectlyIncorrect function selected for value being mesuredRange seitch being set to high for current being measuredRange switch being set too low for current being measured8. What is the effective resistance of the circuit?12Ω0Ω1Ω(11/3 )Ω9. What causes the nucleus of an atom to be positively charged? NeutronsElectronsPositronsProtons10. The basic measurement of resistance isVoltWattOhmAmp11. Ten Coulombs of charge start from the negative terminal of a battery, flow through the battery and then leave the positive terminal through a wire, flow through a resistor and then return to the starting point on this closed circuit. In this complete process, the ten coulombsdo positive work on the batteryhave no net change in electrical potential energyreceive heat energy from the resistorhave a net loss of electrical potential energy12. You have an unlimited supply of 1-W, 100-Ω resistors. You need to get a 100- Ω, 10-W resistor. This can be done most cheaply by means of a series-parallel matrix of3 X 3 resistors2 X 5 resistors4 X 4 resistors4 X 3 resistors13. In a 30 minute interval, one kilowatt-hour of electrical energy is dissipated in a resistance of 20 ohms by a current of10 A20 A18 A14.1 A14. Suppose you have three resistors in parallel, each with a value of 68,000 Ω. Then the total resistance is 23 KΩ204 Ω23 Ω0.2 MΩ15. The first step in calculating voltage drops in a series-parallel circuit is to determine ___Total currentThe resistance of the series resistorsThe resistance of the parallel resistorsTotal voltage16. A lamp, a voltmeter V, an ammeter A, and a battery with zero internal resistance are connected as shown below. Connecting another lamp in parallel with the first lamp as shown by the dashed lines would:increase the voltmeter readingdecrease the ammeter readingdecrease the voltmeter readingincrease the ammeter reading17. Complex circuits can be simplified using one of ___________ lawsKirchoff'sNewton'sFaraday'sFranklin's18. What is the fourth step of the troubleshooting procedure?Check the setupAnalyze the circuitCheck the resultsCalculate and measure values19. The power of the battery in resistors appears asA & Cpower consumptionpower dissipitationpower resistance20. Conversion of temperature into electric voltage is done withrheostatrheostatresistorthermistor21. Good engineering practice usually requires that a series-parallel resistive network be made:From resistors that are all very ruggedFrom a parallel combination of resistors in seriesFrom resistors that are all the sameFrom a series combination of resistors in parallel22. The voltage is 250 V and the current is 8.0 mA. The power dissipated by the potentiometer is2.0 mW2.0 W31 W31 mW23. Electrical shock occurs when and individual touches Electrical componentsElectrical EquipmentPower SuppliesGround and Circuit24. What is current?The flow of charges, usually in the form of electronsThe newness of a battery or resistorSomething that blocks or slows the flow of electronsThe potential energy stored in a battery25. Car batteries are often rated in ampere-hours. This reflects the amount of _________ that can be drawn from the battery.powerchargecurrentvoltage26 out of 25Time is Up! Time's up
