Learners analyze an emitter-biased npn transistor circuit. A "help" screen is available.

In this interactive object, learners solve for total resistance and current, the current through each resistor, the voltage across each resistor, and the power dissipated by each resistor.

In this interactive object, learners solve for total resistance and current, the current through each resistor, the voltage across each resistor, and the power dissipated by each resistor.

Learners examine the concept of propagation delay within a TTL logic gate. The concept is explained with the use of timing diagrams and sample calculations.

In this interactive and animated object, learners practice testing a diode. They determine if a diode is good, open, or shorted.

In this animated object, learners observe the operation of a J thermocouple with a cold junction. A table is used to convert the voltage it produces to a corresponding temperature. A brief quiz completes the activity.

In this animated object, learners examine the operation of a zener diode in the forward and reverse bias conditions. A quiz completes the activity.

This learning object introduces the three approximations of a diode.

In this animated lesson, students view how an oscilloscope and a DC voltmeter measure the voltage of a half-wave rectifier.