Compute current, voltage, resistance, and power, using Ohm's law and Watt's law.
DefinitionComputation requires an understanding of the mathematical and scientific concepts related to Watt’s law and power and should include
- defining the terms of the equation for Ohm's law and Watt's law:
- Ohm's law: V = IR; I = V/R; R = V/I
- Watt’s law: P = VI; I = P/V; V = P/I
- describing the basic scientific principle that
- if resistance to current flow stays the same and the voltage pressure increases, the current flow rate must also increase.
- What is Watt’s law?
- What are the mathematical relationships of Watt’s law?
- How can Watt’s law be used to evaluate circuit characteristics?
- What are the units of measurement involved in Watt’s law, and what is their relationship to one another?
- How do Ohm’s law and Watt’s law relate to each other in the analysis of electronic circuits?
Related Standards of Learning
The student will solve
- multistep linear and quadratic equations in one variables algebraically;
- quadratic equations in one variables algebraically;
- literal equations for a specified variable;
- systems of two linear equations in two variables algebraically and graphically; and
- practical problems involving equations and systems of equations.
The student will
- determine the slope of a line when given an equation of the line, the graph of the line, or two points on the line;
- write the equation of a line when given the graph of the line, two points on the line, or the slope and a point on the line; and
- graph linear equations in two variables.
The student, given a situation in a real-world context, will analyze a relation to determine whether a direct or inverse variation exists, and represent a direct variation algebraically and graphically and an inverse variation algebraically.
The student will solve
- absolute value linear equations and inequalities;
- quadratic equations over the set of complex numbers;
- equations containing rational algebraic expressions; and
- equations containing radical expressions.
The student will represent, create, and solve problems, including practical problems, involving inverse variation, joint variation, and a combination of direct and inverse variations.
The student will investigate and understand how to diagram, construct, and analyze basic electrical circuits and explain the function of various circuit components. Key concepts include
- Ohm’s law;
- series, parallel, and combined circuits;
- electrical power; and
- alternating and direct currents.