Q.1: An RC circuit with a 54.0 V power source is connected to a fluorescent lamp as shown in the Note: Show your work in full to get credit A #: Ac0522odo surc. The lamp L turns on when the voltage across the capacitor reaches 45.0V, which nappens after 0.65 seconds after the switch is closed. If R = 3M2, (a) what is the value o! uie capacitance C? (b) If we must switch the lamps 3 times in a second, what should be the value of capacitance? (c) What is the charge on the capacitor when the lamp just flashes in both the cases? ). value of capacetonce ww R C : 54.0V

Consider following circuit with R1 = 60 Ω, R2 = 18 Ω, R3 = 60 / 10 Ω, R4 = 18/10 Ω and and ξ=18 V d. Write Kirchhoff’s potential difference rule for right loop e. Calculate currents i1 , i2  and i3 ? f. Calculate the potential difference of R2 ? g. Calculate the potential difference of R3 ? h. Calculate the heat dissipation of R2 resistor  i. Cross sections through two long conductors of the same length and material, with square crosssections of edge lengths are shown below. Conductor Y fits snugly within conductor X, Rank theresistance of X and Y?

In the circuit element shown, the current through the 6-W resistor is approximately 30 ww 6Ω 1 - 2.0 A HINT: 1. Find the Equivalent resistance of the parallel portion of the circuit. 1/Reg = 1/R1 + 1/R2 2. Find the Voltage drop across the parallel portion by using Ohm's Law. 3. Then, find the current by = VR O Amps 2.0 Amps 0.40 Amps 0.67 Amps 1.3 Amps

The capacitor in the circuit shown below is initially uncharged. The switch is closed at t = 0 s. AV battery = 30 V, C = 3.0 F, and R = 2.0 2. What is the current in the circuit at t = 3.1 s, in Ampere? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.