Block IV Study Guide

Front

What is the left-hand rule used for?

Back

The left-hand rule is used to determine the direction of the lines of force when the direction of current flow is known.

Front

What is Direct Current (DC)?

Back

Current flowing in one direction, commonly used in batteries and electronic devices.

Front

What is frequency and its standard unit of measurement?

Back

Frequency is the number of cycles per second, measured in Hertz (Hz).

Front

What is the unit of measure for inductance?

Back

Henries (H).

Front

What are the two general types of AC motors commonly used in aircraft systems?

Back

Induction motors and synchronous motors.

Front

What is Alternating Current (AC)?

Back

Current that periodically reverses direction, commonly used in power supply systems.

Front

What is the difference between AC and DC?

Back

AC changes direction periodically, while DC flows in one direction only.

Front

What is the purpose of an inductor in a circuit?

Back

An inductor stores energy in a magnetic field when electrical current flows through it.

Front

What is the relationship between voltage, current, and resistance?

Back

Ohm's Law states that V = I * R, where V is voltage, I is current, and R is resistance.

Front

What is a capacitor and its unit of measure?

Back

A capacitor stores electrical energy in an electric field, measured in Farads (F).