Understanding Ohm's Law

This video tutorial by Paul from theengineeringmindset.com covers Ohm's Law, explaining the relationship between voltage, current, and resistance. It introduces Ohm's triangle as a tool for remembering formulas and provides examples of calculating voltage, current, and resistance. The video also includes practice problems to test understanding and offers additional resources like a PDF guide and an online calculator.

Who developed Ohm's Law?

• Andre Ampere

• Albert Einstein

• Isaac Newton

• Georg Ohm

What does the 'I' in Ohm's Triangle represent?

• Resistance

• Energy

• Current

• Voltage

If a circuit has a current of 2 Amps and a resistance of 3 Ohms, what is the voltage?

• 12 Volts

• 6 Volts

• 5 Volts

• 9 Volts

What happens to the current if the voltage is doubled in a circuit?

• It triples

• It halves

• It doubles

• It remains the same

If a lamp has a resistance of 3 Ohms and is connected to a 6 Volt power supply, what is the current?

• 1 Amp

• 2 Amps

• 3 Amps

• 4 Amps

What is the relationship between current and resistance?

• Directly proportional

• Inversely proportional

• Unrelated

• Exponentially proportional

What is the resistance if a 12 Volt power supply results in a current of 0.5 Amps?

• 48 Ohms

• 6 Ohms

• 24 Ohms

• 12 Ohms

Why is resistance used in circuits?

• To reduce current and protect components

• To increase current

• To increase voltage

• To decrease voltage

If a lamp with 240 Ohms resistance is plugged into a 120 Volt outlet, what is the current?

• 0.25 Amps

• 2 Amps

• 1 Amp

• 0.5 Amps

What voltage is applied if a 240 Ohm lamp results in a current of 0.958 Amps?

• 230 Volts

• 220 Volts

• 240 Volts

• 120 Volts