Basics of Electricity and Electronics #2 | Resistance and equivalent resistances | Electricity 101

This video tutorial from Practical Ninjas covers the basics of resistors, including their role as passive components in electrical circuits. It explains resistance and how it can be calculated using the formula R = ρl/A. The video introduces Ohm's law, which relates current, voltage, and resistance, and demonstrates how to calculate equivalent resistances in series and parallel resistor configurations. The tutorial concludes with a summary and encourages viewers to subscribe for more content.

What is the formula for calculating the resistance of a conductor?

• R = Rho * l / A

• R = l / (Rho * A)

• R = A * l / Rho

• R = Rho / (l * A)

According to Ohm's Law, what is the relationship between current and voltage?

• Current is independent of voltage

• Current is directly proportional to voltage

• Current is inversely proportional to voltage

• Current is equal to voltage

In a series circuit, how is the total voltage across the resistors calculated?

• V = V1 * V2

• V = V1 - V2

• V = V1 + V2

• V = V1 / V2

What is the equivalent resistance of two resistors in series?

• R equivalent = R1 / R2

• R equivalent = R1 * R2

• R equivalent = R1 - R2

• R equivalent = R1 + R2

In a parallel circuit, what remains constant across all resistors?

• Power

• Current

• Resistance

• Voltage

How is the total current in a parallel circuit related to the currents through individual resistors?

• Total current is the product of individual currents

• Total current is the average of individual currents

• Total current is the sum of individual currents

• Total current is the difference of individual currents

What is the formula for calculating the equivalent resistance of resistors in parallel?

• Req = R1 * R2

• Req = R1 + R2

• 1/Req = 1/R1 + 1/R2

• 1/Req = R1 + R2