Electric Current and Circuits

Electric Current and Circuits Principles

Electric Current and Circuits Principles

Articles
Title
A 9-V battery drives 3 A of electric current through a resistor. What is the power dissipated by the resistor?
For the circuit in the diagram, what is the total current?
The resistance of a wire does NOT depend on which of the following?
For the circuit in the diagram, which of the following expressions will describe the amount of current flowing through the resistors?
A 9-V battery is wired in series with three resistors (20 ohms, 30 ohms, 15 ohms).What is the sum of the voltages around the entire circuit?
For the circuit shown in the figure, what must be the sum of the voltages around the complete circuit if the current is 10 A?
For the circuit shown in the diagram, what is the equivalent resistance of the circuit?
Two 40-ohms resistors wired in parallel are connected in series with a 20-ohms resistor and a power supply. The current in each of the parallel resistors is 1.5 A. What is the current flowing through the 20-ohms resistor and the power supply, respectivel
For the circuit shown in the figure, what is the value of the current leaving the parallel branch of the circuit?
A space heater with a resistance of 12 ohms is connected to a 120-V power supply. How much energy is transferred to thermal energy as this device operates for 2 hours?

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