Learners read a description of how an oscilloscope is used to measure the frequency of a sine wave.

In this animated activity, learners examine how various NAND gate configurations and the logic signals produced throughout the circuit perform the functions of all of the other types of logic gates.

Students work practice problems in which the total resistance of the circuit is calculated. Feedback is provided.

In this animated learning object, learners examine how an ultrasonic flowmeter measures the flow of liquids through a pipe using ultrasonic sound waves. A short quiz completes the activity.