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What is the definition of directly proportional?

A relationship where a number increases or decreases together with another number at the same ratio. Directly proportional is the opposite of inversely proportional.

Learn more about directly proportional in the class "Series Circuit Calculations 200" below.

Series Circuit Calculations 200

Electrical Systems Department

Class Information

Tooling U classes are offered at the beginner, intermediate, and advanced levels.
The typical class consists of 12 to 25 lessons and typically requires at least two hours of instruction time.

Class Name	Series Circuit Calculations 200
Description	This class covers the formulas and rules for calculating the values of voltage, current, resistance, and power in direct-current series circuits.
Prerequisites	550110 550120
Difficulty	Intermediate
Number of Lessons	18

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Class Outline

Class Objectives

Objectives

Predicting Electrical Capacity

Series Circuits

Current

Voltage

Resistance

Ohm’s Law

Power

Power Calculations

Voltage Drops

Resistance Values

Rules for DC Series Circuits

Solving Series Circuits

Sample Circuit

Sample Problem

Measuring Devices

Application of Circuit Calculations

Summary

Explain how to predict electrical quantities and capacity in DC series circuits.

Describe the characteristics of a DC series circuit.

Describe the characteristics of current in a DC series circuit.

Describe the characteristics of voltage in a DC series circuit.

Describe the characteristics of resistance in a DC series circuit.

Describe the relationship of the variables in Ohm’s Law.

Describe the characteristics of power in a DC series circuit.

Use the power wheel to select an appropriate formula.

Describe the relationship between voltage drops and total voltage.

Describe the relationship between resistor values and total resistance.

State the rules for DC series circuits.

Solve for the unknown value in a DC series circuit.

Solve for the missing values in a DC series circuit using a schematic drawing.

Solve for the missing values in a DC series circuit using a table.

Identify the devices used to measure electrical values in a DC series circuit.

Describe common applications for circuit calculations.

Class Vocabulary

Term	Definition
ammeter	A device used to measure current flow.
amp	The shortened term for ampere.
ampere	A unit of electrical measurement that describes both an amount of electricity and the time it takes for electricity to travel a certain distance. One amp equals one coulomb per second.
capacity	The amount of electricity that can safely flow through a wire without the wire overheating.
control	A part or component in a circuit that controls the flow of electricity.
coulomb	The smallest quantity measurement of electrical current. A coulomb may be thought of as a "drop" of electricity.
current	The flow of electricity. Current is measured in amps.
de-energized	When power retained by sophisticated electronic devices is removed with a special shorting instrument.
direct current	Current that travels in one direction. Direct current does not reverse the direction of flow.
directly proportional	A relationship where a number increases or decreases together with another number at the same ratio. Directly proportional is the opposite of inversely proportional.
electromotive force	The force that pushes electrons through a conductor.
in parallel	When current passes through separate components in a circuit simultaneously because there is more than one path for current to flow.
in series	When current passes through all components in a circuit one after another because there is only one path for current flow.
inversely proportional	A relationship where a number either increases as another decreases or decreases as another increases. Inversely proportional is the opposite of directly proportional.
joule	The amount of power used when 1 amp flows through 1 ohm for 1 second.
Kirchoff’s Voltage Law	The universal truth stating that the sum of the voltages around any closed loop must equal zero.
load	The part or component in a circuit that converts electricity into light, heat, or mechanical motion. Examples of loads are a light bulb, appliance, or machine.
multimeter	A device that combines the functions of an ammeter, voltmeter, and ohmmeter.
ohm	The unit of measurement for electrical resistance.
Ohm’s Law	The universal truth stating that it takes one volt to push one amp through one ohm.
ohmmeter	A device used to measure resistance.
path	A conductor that directs electricity in a circuit. The path is often copper wire.
power	The rate at which a device converts electrical energy into another form, such as heat or light. Power is measured in watts.
resistance	The opposition to current flow. Resistance is measured in ohms.
resistor	A device that restricts current flow and produces work, such as heat.
series circuit	A route for the flow of electricity that has only one path.
source	The device that provides electrical power to a circuit. The source is the origin of electricity, such as a battery or power plant.
volt	A unit of voltage or electrical pressure.
voltage	A measure of electrical pressure or potential known as electromotive force. Voltage is measured in volts.
voltage drop	The amount of voltage needed to push a given amount of current through a given amount of resistance.
voltmeter	A device used to measure voltage.
watt	A unit of measurement for the wattage or power being used in a circuit. Watts require a change in energy to exist.
wattage	The power being used in a circuit. It is measured in watts.
work	The result of electricity flowing through some type of resistance. Work appears in the form of heat, light, or motion.

What is the definition of directly proportional?

A relationship where a number increases or decreases together with another number at the same ratio. Directly proportional is the opposite of inversely proportional.Learn more about directly proportional in the class "Series Circuit Calculations 200" below.

Series Circuit Calculations 200

Electrical Systems Department

A relationship where a number increases or decreases together with another number at the same ratio. Directly proportional is the opposite of inversely proportional.

Learn more about directly proportional in the class "Series Circuit Calculations 200" below.