# Compute electrical power in circuits.

## Definition

Computation should include- using the same value components that are physically installed in the circuit
- retaining at least three significant figures (i.e., decimal places) on all measurements
- reconciling differences between computed and measured values (often attributable to rounding errors).

## Process/Skill Questions

- Why might computed values differ from measured values?

## Related Standards of Learning

## Mathematics

### A.1

The student will

- represent verbal quantitative situations algebraically; and
- evaluate algebraic expressions for given replacement values of the variables.

### A.4

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.

### AII.3

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.

## Science

### PH.11

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.