29/03/2020D.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. Convert .00004 to metric prefix.4 Milli4 Micro40 Milli40 Micro2. Potential difference between ends of conductor maintained by the battery isconstantzeroonedifferent3. Flow of charges in the direction of electrons is calledelectronic currentcurrentphoton currentconventional current4. In a 30 minute interval, one kilowatt-hour of electrical energy is dissipated in a resistance of 20 ohms by a current of14.1 A20 A10 A18 A5. A resistor is connected to a battery. If you replace the resistor with one that has twice the resistance, by what factor does the power dissipated in the circuit change?Half as much power is dissipated.There is no change in power dissipation if the voltage is unchanged.Twice as much power is dissipated.One fourth as much power is dissipated6. What is not required for troubleshooting a circuit?Schematic diagramTest equipmentTest pointsVoltages and signals7. What effect on total current flow will a shorted series component have in a series-parallel circuit?There will be no effectTotal current will stopTotal current will decreaseTotal current will increase8. Burns cause by electrical current flowing through the body tissue and bones are calledShock BurnsArc BurnsThermal Contact BurnsElectrical Burns9. The first step in calculating voltage drops in a series-parallel circuit is to determineThe resistance of hte parallel resistorsThe resisistance of the series resitorsTotal CurrentTotal Voltage10. Complex circuits can be simplified using one of ___________ lawsFranklin'sNewton'sKirchoff'sFaraday's11. Given a dc voltage source delivering 24 V and a circuit resistance of 3.3 KΩ, what is the current?0.73 A138 A138 mA7.3 mA12. You have an unlimited supply of 1-W, 1000-Ω resistors, and you need to get a 3000 Ω, 5 W resistance. The best way is toMake a 2 X 2 series-parallel matrixDo something other than any of the aboveMake a 3 X 3 series-parallel matrixConnect three of the resistors in parallel13. 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?EBDCA14. The power of the battery in resistors appears aspower resistancepower consumptionA & Cpower dissipitation15. Suppose six resistors are hooked up in series, and each of them has a value of 540 Ω. Then the total resistance is3.24 KΩ90 Ωnone of the above540 Ω16. Car batteries are often rated in ampere-hours. This reflects the amount of _________ that can be drawn from the battery.voltagepowerchargecurrent17. What type of circuit combines one or more series circuits with one or more parallel circuits?SeriesSimpleParallelSeries-parallel18. Suppose that a circuit has 472 Ω of resistance and the current is 875 mA. Then the source voltage isNone of the above0.539 V1.85 V413 V19. Ohm's Law states that current is _____.Inversely proportional to powerInversely proportional to voltageDirectly proportional to resistanceDirectly proportional to voltage20. Three resistors, with values of 47 Ω, 68 Ω, and 82 Ω, are connected in series with a 50-V dc generator, as shown in Fig. 4-12. The total power consumed by this network of resistors is: 250 mWNot determinable from the data given13 W13 mW21. A 500 W heater carries a current of 4.0 A. How much does it cost to operate the heater for 30 min if electrical energy costs 6 cents per kW‑hr?1.5 cents3.0 cents9.0 cents6.0 cents22. 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 electric field strength is one volt/meterThe potential difference is one volt.The current is one ampere.he resistance is one ohm.23. Fractional change in resistance per kelvin is known asresistance constanttemperature coefficientresistance coefficienttemperature constant24. In a series circuit the _______________ is always the same ResistanceCurrentPowerVoltage25. What is the unit of measure for power?AmpereOhmWattVolt26 out of 25Time is Up!
