# Electricity: Electric Circuits

We have 15 ready-to-use problem sets on the topic of Electric Circuits. These problem sets focus on the use of circuit concepts and equations to analyze simple circuits, series circuits, parallel circuits, and combination circuits.

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Problem Set EC1:  Electric Current
Relate the amount of charge passing a point on a circuit to the current and the time. Some problems requiring multiple steps (for example, unit conversions or calculating the Coulombs of charge from the number of electrons). Includes 9 problems.

Problem Set EC2:  Electric Resistance
Relate the resistance of a wire to the cross-sectional area, the length, and the resistivity of the material the wire is composed of. Includes 5 problems.

Problem Set EC3:  Voltage-Current-Resistance 1
Use the ∆V=I•R equation to solve for an unknown quantity when given the other two quantities. Includes 7 problems.

Problem Set EC4:  Voltage-Current-Resistance 2
Use the ∆V=I•R equation to solve for an unknown quantity when given the other two quantities.  Problems require unit conversions. Includes 4 problems.

Problem Set EC5:  Power-Energy-Time
Relate the power of an electrical device to the ration of the energy it uses and the time of use (and in some instances, to the cost of using it). Includes 7 problems.

Problem Set EC6:  Electric Power 1
Determine the power of an electrical device from knowledge of two of the following quantities:  current, resistance, and electric potential difference. Includes 8 problems.

Problem Set EC7:  Electric Power 2
Use the known power rating of an electrical device to determine either the current in, the resistance of, or the electric potential across the device. Some problems include non-customary units. Includes 10 problems.

Problem Set EC8:  Electric Power 3
Integrate an understanding of power as the rate at which energy is used by an electrical device with the equations that relate power to circuit quantities like current, resistance, and electric potential difference. Includes 10 problems.

Problem Set EC9:  Series Circuits 1
Relate the voltage of a source to the voltage drops of individual resistors in a series circuit and relate the equivalent resistance to the individual resistor’s resistance values. Includes 8 problems.

Problem Set EC10:  Series Circuits 2
Use the ∆V=I•R relationship to relate the individual resistance values to the equivalent resistance and the current in a series circuit. Includes 5 problems.

Problem Set EC11:  Series Circuits 3
Conduct a complete analysis of a series circuit to determine quantities such as equivalent resistance, currents, voltage drops, and power. Includes 10 problems.

Problem Set EC12:  Parallel Circuits 1
Determine a branch current from currents in other branches and outside the branches; determine voltage drops across a branch from the voltage of a source; and determine the equivalent resistance from the resistance of all resistors. Includes 10 problems.

Problem Set EC13:  Parallel Circuits 2
Analyze 2-resistor parallel circuits to determine equivalent resistance values, currents in each branch, and the current outside of the branches. Includes 5 problems.

Problem Set EC14:  Parallel Circuits 3
Analyze 3-resistor parallel circuits to determine equivalent resistance values, currents in each branch, and the current outside of the branches. Includes 6 problems.

Problem Set EC15:  Combination Circuits 1
Analyze a combination circuit to determine the equivalent resistance and the currents in the branches and outside of the branches. Includes 6 problems.