#### Science - 2018-19

# PH.11 - Electrical Circuits

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

a) Ohm’s law;

b) series, parallel, and combined circuits;

c) electrical power; and

d) alternating and direct currents.**Bloom's Levels:**Analyze; Understand

*Adopted: 2010*

### BIG IDEAS

- I can design circuits for a home that will provide the electricity needed.
- I can explain, why when one light goes out, they all go out.
- I can explain what the measurements on a light bulb mean.
- I can explain the differences between batteries and wall outlets.

### UNDERSTANDING THE STANDARD

The concepts developed in this standard include the following:

- Current is the rate at which charge
moves through a circuit element.
- Electric potential difference
(voltage) in a circuit provides the energy that drives the current.
- Elements in a circuit are
positioned relative to other elements either in series or parallel.
- According to Ohm’s law, the
resistance of an element equals the voltage across the element divided by the
current through the element.
- Potential difference (voltage)
is the change in electrical potential energy per unit charge across that
element.
- The dissipated power of a circuit
element equals the product of the voltage across that element and the current
through that element.
- In a DC (direct current)
circuit, the current flows in one direction, whereas in an AC (alternating
current) circuit, the current switches direction several times per second (60Hz
in the U.S.).

### ESSENTIALS

In order to meet this standard, it is expected that students will

a) apply Ohm’s law to a series and a parallel circuit.

solve simple circuits using Ohm’s law.

b) recognize a series and a parallel circuit.

assemble simple circuits composed of batteries and resistors in series and in parallel.

c) calculate the dissipated power of a circuit element.

d) recognize that DC power is supplied by batteries and that AC power is supplied by electrical wall sockets.

### KEY VOCABULARY

*Updated: Dec 01, 2017*