29/03/2020 D.C Circuits(Senior Class Physics Study by Topics) 29/03/2020 0Comments by Gate Academy Welcome to your D.C Circuits(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. What is the unit of measure for power? Ampere Watt Volt Ohm 2. Effect that is not produced by current is heating effect contraction effect chemical effect magnetic effect 3. Formulae written as V(Q/T) is of velocity acceleration power work done 4. The voltage is 250 V and the current is 8.0 mA. The power dissipated by the potentiometer is 31 W 31 mW 2.0 mW 2.0 W 5. 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 of 4 X 4 resistors 3 X 3 resistors 2 X 5 resistors 4 X 3 resistors 6. A high‑voltage transmission line carries 1000 A at 700,000 V. What is the maximum power carried in the line? 700 GW 700 kW 1.43 kw 700 MW 7. The first step in calculating voltage drops in a series-parallel circuit is to determine Total Voltage The resisistance of the series resitors The resistance of hte parallel resistors Total Current 8. What is current? Something that blocks or slows the flow of electrons The flow of charges, usually in the form of electrons The newness of a battery or resistor The potential energy stored in a battery 9. Resistors are rated in Joules Watts Volts Amps 10. What would cause a component to drop the applied voltage? An increase in Value A Short A decrease in value An open 11. Convert 10000 to metric prefix 10 Mega 100 Mega 10 Kilo 100 Kilo 12. Convert .00004 to metric prefix. 4 Milli 40 Micro 4 Micro 40 Milli 13. 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 to Make a 2 X 2 series-parallel matrix Connect three of the resistors in parallel Make a 3 X 3 series-parallel matrix Do something other than any of the above 14. What is the maximum possible voltage and current through the circuit? 6.0V,0.24A 6.0V,0.48A 0V,0.48A 0V,0.24A 15. The power dissipated in a wire carrying a constant electric current, I, may be written as a function of the current I, the wire length L, the diameter d of the wire, and the resistivity, ρ, of the wire material. In this expression, the power dissipated is directly proportional to which of the following? L and ρ only d only L only d and ρ only 16. Burns cause by electrical current flowing through the body tissue and bones are called Shock Burns Electrical Burns Arc Burns Thermal Contact Burns 17. Which of the following IS NOT a typical indication of an overload condition? "OL" for overload Flashing LIghts "E" for error The display shows 0 18. According to Ohm's law: E=I/R R=E*I I=P*E E=I*R 19. What material is affected most by flux lines? Steel Glass Aluminum Wood 20. Complex circuits can be simplified using one of ___________ laws Franklin's Kirchoff's Faraday's Newton's 21. Suppose that a circuit has 472 Ω of resistance and the current is 875 mA. Then the source voltage is 1.85 V 0.539 V None of the above 413 V 22. What is not required for troubleshooting a circuit? Schematic diagram Test equipment Test points Voltages and signals 23. Subtract (4M) - (2M) 4M 6M 8M 2M 24. What is the fourth step of the troubleshooting procedure? Check the setup Analyze the circuit Calculate and measure values Check the results 25. 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: decrease the ammeter reading decrease the voltmeter reading increase the voltmeter reading increase the ammeter reading 1 out of 25 Time is Up! Time's up