In the circuit, the potential difference across the battery is 18 V. V1 is 7.0 V and R2 = 30.0 Ω. a) Calculate the values of R1, V2, and the current through the circuit.  (b) How long will it take for 12 C of charge to pass through the circuit?

b). If a 50 ohms resistor is used while a 15 µF capacitor is being charged by a 10 volts cell, use a sketch to show how long it will take the capacitor to be fully charged

Consider the following circuit diagram, assuming the voltage is V = and all the capacitors have C = 2µF. 10v, C, C3 C5 a) By finding the equivalent capacitance, and then working backwards, find the voltage drop across each capacitor, and the charge stored on each ca- pacitor. b) What is the energy stored in each capacitor? c) Now replace each capacitor with R= 20 resistors. By finding the equiv- alent resistance and working backwards, find the voltage drop across each resistor and the current through each resistor. d) What is the power dissipated by each resistor? What is the power deliv- ered by the voltage source?

A real battery has an electromotive force of 12.0 volts and has an internal resistance of 6.00 ohms and a current of 0.500 amps.  What is the actual voltage of the battery?

Q37

A capacitor with C=1 pF is charged, showing a voltage of 1 V. In order to discharge it, an ohmic resistor of 5 MW is used. How long does it take until 100,000 electrons have left the capacitor?

a) What is the terminal voltage (in V) of a large 1.35 V carbon-zinc dry cell used in a physics lab to supply 1.80 A to a circuit, if the cell's internal resistance is 0.300 Ω?  b) How much electrical power (in W) does the cell produce? and c) What power (in W) goes to its load?

A charge of 7.00 C passes through a pocket calculator's solar cells in 2.00 h. What is the power output (in W), given the calculator's voltage output is 4.00 V?

A charge of 4.00 C of charge passes through a pocket calculator’s solar cells in 4.00 h. What is the power output, given the calculator’s voltage output is 3.00 V?

A heart defibrillator passes 12 A of current through a patient's torso for 3×10-3 s to restore normal beating of the heart. (a) How much charge passed through the patient's body? (b) What voltage was used if a total energy of 300 J was dissipated by the current? (c) Estimate the resistance of the electrical path through the person. State any assumptions made in answering this question.