1. A 9.4 A current is maintained in a simple circuit with a total resistance of 18 Ω.  How much energy in kJ is delivered in 42 seconds [round your final answer to one decimal place]?

A 12 volt car battery is being used to power a circuit with a total resistance of 0.5 Mega-ohm. a) What is the power (in watts) being used by this circuit? b) The circuit is switched on for exactly 27.3 days and then switched off. How much energy has the circuit used (in joules AND kilowatt-hours) in this time? c) If the current rate of hydro use is 10.1 cents per kilowatt-hour, how much would the use of this circuit contribute to your hydro bill (assuming that no other charges apply)?

4. Which of the following statements is true of the voltameters? A. Voltmeter 1 and voltmeter 2 will read the same voltage. B. Voltmeter 1 will read 6 V. C. Voltmeter 2 will read 6 V. D. Voltmeter 2 will read the correct voltage across the 3Ω resistor. E. Both voltmeters will read the correct voltage across the 6Ω resistor.

6. In the circuit shown to the right l = 2.0 A and I = 3.0 A. Find the values of the following: a. Vbd b. la c. RT ime b S.. 50 V

Two resistors are connected in series with an 15.19 volt battery. The resistors have values of R1 = 1.41 ohms and R2 = 6.28 ohms. What is the current (in amps) in this circuit? Round your answer to two decimal places.

6. A 8.00 µF capacitor is connected in series to a 120-V battery, a 550-2 resistor, and a switch. What is the voltage across the resistor, 6.60 ms after closing the switch?

A circuit with a battery, a 4 Ω resistor, a 15 Ω resistor, and a 22 Ω resistor in series. The total current is the system is 9.6 A. What is the voltage of the battery?

$6

14. A power supply providing 85 V is hooked in series to a lightbulb, using two connecting wires. The lightbulb has a resistance bulb B. of 130 N and the wires have a resistance of 15 2 each. The actual question is, how much power does the bulb use, and how much power is lost in the wires? This is broken down into steps. a. What is the equivalent resistance of the series circuit? [160 Q] b. What is the current through the circuit? [.53 A] c. What is the magnitude of the potential difference between points A and B? (What is the voltage across wire 1?) [8 V] d. What is the magnitude of the potential difference between points wire 1 wire 2 A B and C? (What is the voltage across the bulb?) [69 V – note that the voltage across the bulb is NOT the 85 V of the power supply. The sum of the voltages, 8+69+8, around the circuit, IS the voltage of the power supply.) e. How much power is used by the bulb? [36.6 W] f. How much power is lost in the one of the wires? [4.2 W] |