Understanding Ohm's Law and Circuits

The video tutorial explains Ohm's Law, its historical background, and its significance in electrical technology. It covers the relationship between current, voltage, and resistance, providing a formula and practical examples for better understanding. The Ohm's Law triangle is introduced as a memory aid for calculations. A practical demonstration using a circuit is shown, highlighting the difference between ohmic and non-ohmic conductors.

Who discovered Ohm's Law?

• Isaac Newton

• Albert Einstein

• George Ohm

• Nikola Tesla

What does Ohm's Law state about the relationship between current and voltage?

• Current is unrelated to voltage

• Current is inversely proportional to voltage

• Current is equal to voltage

• Current is directly proportional to voltage

In the formula V = I * R, what does 'R' represent?

• Resistance

• Power

• Voltage

• Current

If a circuit has a resistor of 100 ohms and a current of 0.1 amps, what is the voltage?

• 0.1 volts

• 100 volts

• 10 volts

• 1 volt

What is the purpose of the Ohm's Law triangle?

• To calculate power

• To remember the relationship between voltage, current, and resistance

• To convert units

• To measure resistance

In the Ohm's Law triangle, if you need to find the current, what operation do you perform?

• Multiply voltage and resistance

• Divide voltage by resistance

• Subtract resistance from voltage

• Add voltage and resistance

What type of multimeters were used in the practical demonstration?

• Analog multimeters

• Both digital and analog multimeters

• Neither digital nor analog multimeters

• Digital multimeters

What is the resistance measured in the practical demonstration using a digital multimeter?

• 181.6 ohms

• 100 ohms

• 150 ohms

• 200 ohms

What is the characteristic of ohmic conductors?

• They do not conduct electricity

• Their current-voltage characteristic forms a straight line

• They have a non-linear current-voltage characteristic

• Their resistance changes with voltage

What are components called whose resistance changes with voltage?

• Capacitors

• Non-ohmic components

• Resistors

• Ohmic components