Parallel Circuits: Base Electronics: 9

This video tutorial introduces the concept of parallel circuits using a water flow analogy. It explains how current splits in parallel circuits and how voltage remains constant across branches. The tutorial covers calculations of current using Ohm's law and Kirchhoff's law, demonstrating how resistance affects current distribution. It introduces the concept of equivalent resistance to simplify complex parallel circuits. The lesson concludes with a summary and a preview of the next topic, series circuit analysis.

What happens to the electrical current when a circuit splits into two branches?

• The current doubles in each branch.

• The current stops flowing.

• The current splits between the branches.

• The current flows only through one branch.

In a parallel circuit, how does the voltage across each branch compare?

• It is double for each branch.

• It is different for each branch.

• It is the same for each branch.

• It is zero for each branch.

If two resistors in a parallel circuit have the same resistance, how is the current distributed?

• All current flows through one resistor.

• Equally between the resistors.

• Unequally, depending on the voltage.

• No current flows through the resistors.

Using Ohm's law, what is the current through a 220-ohm resistor in a parallel circuit with a 6-volt battery?

• 0.6 amps

• 0.067 amps

• 0.0273 amps

• 0.04 amps

According to Kirchhoff's law, how do you find the total current in a parallel circuit?

• By dividing the total voltage by the total resistance.

• By adding the currents in each branch.

• By multiplying the currents in each branch.

• By subtracting the smallest current from the largest.

In a three-branch parallel circuit, which branch will have the highest current?

• The branch with the highest resistance.

• The branch with the lowest resistance.

• The branch with the middle resistance.

• All branches have the same current.

What is the total current in a parallel circuit with resistors of 150 ohms, 220 ohms, and 10 ohms, and a 6-volt battery?

• 0.667 amps

• 0.04 amps

• 0.0273 amps

• 0.6 amps

What is the equivalent resistance of resistors in parallel?

• The sum of all resistances.

• Greater than the largest resistance.

• The product of all resistances.

• Less than the smallest resistance.

How can you simplify the calculation of total current in a complex parallel circuit?

• By ignoring the resistors.

• By calculating the equivalent resistance.

• By measuring each branch's voltage.

• By using Kirchhoff's law only.

What is the equivalent resistance of a parallel circuit with resistors of 150 ohms, 220 ohms, and 10 ohms?

• 220 ohms

• 8.99 ohms

• 380 ohms

• 150 ohms