Resistance Part One: Base Electronics: 5

This lesson covers electrical resistance, explaining it as the opposition to current flow in a circuit, measured in Ohms. It discusses the extremes of resistance, from infinite to none, using a switch as an example. Resistors are introduced as components to control current and voltage. A water flow analogy is used to illustrate how resistors impede current, similar to hair clogging a pipe. The lesson explains how to adjust current and voltage by changing resistance, ensuring optimal flow in circuits. It concludes with a review of key concepts, setting the stage for further lessons on circuit analysis.

What is the unit of measurement for electrical resistance?

• Watts

• Amperes

• Volts

• Ohms

What happens in a circuit with infinite resistance?

• Resistance decreases

• Voltage increases

• No current flows

• Current flows freely

Why do we use resistors in electrical circuits?

• To increase current flow

• To change voltage levels

• To decrease voltage

• To eliminate resistance

In the water flow analogy, what does a resistor represent?

• A sprinkler

• A tube

• A water pump

• Hair in a pipe

How can you increase current in a circuit with higher resistance?

• Add more resistors

• Remove resistors

• Increase voltage

• Decrease voltage

What is one reason to intentionally introduce resistance into a circuit?

• To increase current flow

• To protect components

• To eliminate voltage

• To increase resistance

What might happen if the current flow exceeds the optimal level in an electrical component?

• The component may function better

• The component may be damaged

• The resistance will decrease

• The voltage will stabilize