Practice # 2 Current, Voltage, Resistance, Components

Front

What is the primary function of a resistor in a circuit?

Back

To limit the amount of current flow.

Front

In conventional current theory, the direction of current flow is from:

Back

Positive to negative.

Front

What is the schematic symbol for a fixed resistor?

Back

A rectangle.

Front

What is the most common source of thermal electricity in the aviation industry?

Back

Thermocouples.

Front

According to electron flow theory, where do electrons flow from?

Back

From a negatively charged source to positive.

Front

Define voltage.

Back

Voltage is the electric potential difference between two points in a circuit.

Front

What is Ohm's Law?

Back

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

Front

What is the unit of resistance?

Back

Ohm (Ω).

Front

What is the role of a potentiometer in a circuit?

Back

To adjust voltage levels.

Front

What is the difference between a fixed resistor and a variable resistor?

Back

A fixed resistor has a constant resistance, while a variable resistor can change its resistance.