The Complete Beginners Guide to Arduino - 2021 - Resistance and Ohms Law

The video tutorial explains Ohm's Law, discovered by Georg Ohm in 1827, which describes the relationship between current, voltage, and resistance in an electric circuit. It covers the basics of electric circuits, including the flow of current, the role of voltage, and the concept of resistance. The tutorial introduces the standard units and symbols for these quantities and explains Ohm's Law equation (V=IR). Practical examples demonstrate how to apply the equation to calculate current, voltage, and resistance in various circuit scenarios.

Who discovered Ohm's Law and in which year?

• Albert Einstein in 1905

• Georg Ohm in 1827

• Isaac Newton in 1687

• Nikola Tesla in 1891

What is the standard unit of measurement for current?

• Watt

• Ampere

• Ohm

• Volt

In Ohm's Law, what does the equation V = I * R represent?

• Voltage is the sum of current and resistance

• Voltage is the product of current and resistance

• Current is the product of voltage and resistance

• Resistance is the sum of voltage and current

If a circuit has a voltage of 12 volts and a current of 0.8 amps, what is the resistance?

• 20 ohms

• 10 ohms

• 9.6 ohms

• 15 ohms

How does increasing the voltage in a circuit affect the current, assuming resistance remains constant?

• The current remains the same

• The current decreases

• The current increases

• The resistance increases