The Complete Beginners Guide to Arduino - 2021 - Basic Electric Theory

The video tutorial introduces the fundamental concepts of electricity, focusing on three key units: voltage, current, and resistance. It uses a water analogy to explain how electric current flows, measured in amperes, and how voltage acts as the pushing force that drives this flow. The relationship between voltage and current is highlighted, showing that increasing voltage results in increased current. Resistance is introduced as a factor that restricts current flow, akin to narrowing a pipe in the water analogy. The tutorial sets the stage for deeper exploration of these concepts in future lessons.

Which of the following is NOT one of the three essential units used in electricity?

• Power

• Voltage

• Current

• Resistance

What is the unit of measurement for electric current?

• Coulomb

• Ampere

• Volt

• Watt

In the context of electricity, what does the symbol 'I' represent?

• Power

• Voltage

• Resistance

• Current

What is the relationship between voltage and current?

• Voltage decreases as current increases

• Voltage and current are unrelated

• Increasing voltage increases current

• Current decreases with increasing voltage

What is the unit of measurement for voltage?

• Volt

• Coulomb

• Ampere

• Ohm

What effect does resistance have on the flow of current in a circuit?

• It has no effect on current flow

• It reverses the direction of current

• It increases the flow of current

• It restricts the flow of current

In the water analogy for resistance, what happens when the diameter of the pipe is decreased?

• Water flow remains unchanged

• Water pressure decreases

• Water flow is restricted

• Water flows faster