Three charges are aligned along the x-axis with: Q_1 = +8.00 mu C at the origin,

Question

Three charges are aligned along the x-axis with: Q_1 = +8.00 mu C at the origin, Q_2 = -4.00 mu C at x = 20.0 cm, and Q_3 = +7.00 mu C at x = 30.0 cm. Determine the net electric field at Q_1 due to the other two charges. Specify direction. Two capacitors, C_1 = 8.00 mu F and C_2 = 6.00 mu F, are connected in series and the series combination is connected to a 24.0 V DC source. Determine the equivalent capacitance for the combination. Determine the total charge delivered to the combination. Determine the charge and potential for each capacitor. A parallel-plate capacitor C = 0.005 mu F is connected to a battery with V = 9.00 V. The separation of the plates on the capacitor is d = 0.0100 min. Determine the electric field between the plates of the capacitor. Determine the energy stored on the capacitor. Every morning you turn on on overhead light, P_L = 320 W, for 30 minutes while you eat breakfast. You use a toaster, P_r = 1350 W, for 4.0 minutes to warm up your pop tart. Calculate the total electrical energy, light plus toaster, that you use in kW-h for a 30 day month. If the energy costs $0.12kW-h, calculate the cost. Three resistors are connected as shown below. Determine the equivalent resistance for the three resistors. Determine the total current supplied by the battery. Determine the current and potential for the 20.0 ohm resistor.

Explanation / Answer

3. field due to Q2:

E2 = k Q2 / d^2 i

E2 = (9 x 10^9) (4 x 10^-6) / 0.20^2 i

E2 = 9 x 10^5 N/C i

field due to Q3:

E3 = (9 x 10^9) (7 x 10^-6) / (0.30^2) (-i)

E3 = - 7 x 10^5 N/C i

E = E2 + E3

E = 2 x 10^5 N/C along +x axis

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