Understanding Parallel Circuits

The video tutorial explains how to calculate the current flowing through resistors in parallel circuits. It starts with a simple two-resistor setup, demonstrating intuitive and formula-based methods for current distribution. The tutorial then progresses to circuits with three and four resistors, using Ohm's Law and equivalent resistance formulas to determine current flow. The video emphasizes the concept that voltage across parallel resistors remains constant and provides step-by-step calculations for each scenario.

In a parallel circuit with two resistors, if one resistor has twice the resistance of the other, how does the current through the higher resistance compare?

• It is twice as much.

• It is half as much.

• It is three times as much.

• It is the same.

What is the total current entering a two-resistor parallel circuit if the current through one resistor is 4 amps and through the other is 2 amps?

• 12 amps

• 10 amps

• 8 amps

• 6 amps

Which formula is used to calculate the current through a resistor in a two-resistor parallel circuit?

• I = Total Current / (R1 + R2)

• I = Total Current * (R2 / (R1 + R2))

• I = R1 / R2

• I = V/R

In a three-resistor parallel circuit, what is the first step in calculating the current through one of the resistors?

• Divide the total current by the number of resistors.

• Add all resistances together.

• Use the formula involving the reciprocal of resistances.

• Multiply the total current by the resistance.

If the resistance of a resistor in a parallel circuit is doubled, what happens to the current through it?

• It remains the same.

• It doubles.

• It halves.

• It triples.

How can you verify the current calculations in a parallel circuit?

• By checking if the total resistance is equal to the sum of individual resistances.

• By ensuring the voltage across each resistor is the same.

• By adding the currents through each resistor.

• By multiplying the total current by the total resistance.

In a four-resistor parallel circuit, what is the common denominator used for simplifying the calculation?

• 12

• 24

• 48

• 16

What is the total current in a four-resistor parallel circuit if the currents through the resistors are 4A, 2A, 3A, and 6A?

• 25A

• 20A

• 15A

• 10A

What is the voltage across each resistor in a parallel circuit if the current through a 12-ohm resistor is 4 amps?

• 36 volts

• 24 volts

• 48 volts

• 60 volts

In a parallel circuit, if one resistor has a resistance of 8 ohms and another has 16 ohms, how does the current through the 8-ohm resistor compare to the 16-ohm resistor?

• It is half.

• It is triple.

• It is the same.

• It is double.