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A: We will make use of mesh analysis.
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- A current of 4.5mA flow through a copper wire in area of 20mm2. The current density is O a. 225000A/m O b.225A/m2 444A/m2 C. O d. 2.25 x10-4 A/m² QUESTION 4 Three resistors of 202, 502, ad 1002 can be connected in series or in parallel. What minimum and maximum resistance can you obtain from these? O a. Rmin=1502; Rmax = 0.082 O b. Rmin=1702; Rmax = 12.52 c. Rmax=170Q; Rmin= 12.5Q O d. Rmin=0.082; Rmax = 12.5Q5. You are discharging a 17μF capacitor in a circuit that has a 100 Q resistor and a 12 V battery. 1001 AV₁ = - E(₁-e +/) - 1/x = ln (1-04) 12V a. 17 N Find the final current after 3 milliseconds. b. What time constant would you need if at t = 3 milliseconds, you measure a potential difference AVc = 9V?la. This resistor has a resistance of 48002, and 32mA of current flows to the left into it. The right end of the resistor is at a potential of VR= 12.5V. What is the potential difference AV across the resistor? - VL? resistor 1b. What is the potential VL of the left end of the resistor? 1c. What is the power output by the resistor? R = 4800 1d. What is the current that flows out of the resistor? I = 32mA o at io. - VR=12.5V or gads di ei tedw $70 a vrutsd ads to bas ovisyon siis liszug
- la. This resistor has a resistance of 48002, and 32mA of current flows to the left into it. The right end of the resistor is at a potential of VR= 12.5V. What is the potential difference AV across the resistor? 1b. What is the potential VL of the left end of the resistor? 1c. What is the power output by the resistor? VLP 1d. What is the current that flows out of the resistor? resistor R=4800 I I= 32mA VR=12.5Va. A proton beam in an accelerator carries a current of 110 µA. If the beam is incident on a target, how many protons strike the target in a period of 25.0 s? protons b. An electric heater carries a current of 20.0 A when operating at a voltage of 4.20 102 V. What is the resistance of the heater? Ω c. If a certain silver wire has a resistance of 10.00 Ω at 15.0°C, what resistance will it have at 29.0°C? ΩA 20V battery is used to supply current to a 10k resistor. Assume the voltage drop across any wires used for connections is negligible. What is the power dissipated by the resistor? O a. 0.002W O b. 20W O C. 0.04W O d. 40W
- An electric device draws 6.5 A at 240 V. If the voltage drops by 15%, what will be the new current? O 1. None O 2. 5.5 A О3. 1А O 4. 6 A O 5. 4.8 A nt questions on the final re to search SSUSA capacitor with capacitance C = 2.5 μF is charged to a voltage V = 5V. It is then discharged through a resistor R = 100Ω. What is the initial discharge current through the resistor? Select one: a. 12.5 μA b. 50 μA c. 20 A d. 50 mAIn the Figure shown, the current passes the battery equal to 30mA, What is the value of R1? 20V= R1 R2 5 k2 R31.2 k2 Select one: a. 1.500 kS b. 666.7 2 C. 310.0 Q d. 2.143 k e. 967.7 2
- Copper conductor has a radius of 2mm with current I=10A, If n= 8.48x1023 electron/m3 then the drift velocity of the electrons: Select one: O a. 20.1x109 m/s O b. 5.8×10-12 m/s O c. 0.17x105 m/s O d. 5.8x105 m/sThe capacitor in the figure is initially uncharged. The 30 0 a. Immediately after the switch is closed, what is the current through each resistor? b. What is the final charge of the capacitor? 12 V 900 9µFA 6.0 x 10°°Farad capacitor is initially charged to 1.0 x 10²V and then connected across a 5.0 x 102 Ohm resistor 1. What is the initial charge on the capacitor? 2. What is the initial current just after the capacitor is connected to the resistor? 3. What is the time constant of this circuit? 4. How much charge is on the capacitor after 6.0 x 10-3 s?