Learners examine how the load resistance connected to the secondary coil of a transformer affects the primary current. A brief quiz completes the activity.

Students read descriptions of the voltage, current, and turns ratios of the primary and secondary coils for a transformer in this interactive lesson.

In this learning activity you'll explore what a denial of service attack is and learn how a single hacker can take down an entire system.

In this learning activity you'll calculate exponents. You'll practice breaking down exponents and calculating the results.

In this interactive object, learners practice using the phrasal verbs "get on," "get over," "get away," "get down to," and "get away with."

In this animated object, learners examine how PLC up/down-counters are used to control an automated parking lot gate.

Learners view videos of law enforcement and corrections officers describing their jobs and the opportunities in their fields. Because this object contains large video files, it is best viewed using a high band width connection. Low band widths will result in longer download time and video delays.

In this animated object, learners examine the operation of up-counters and down-counters for a programmable controller. A brief quiz completes the activity.