Electrical Circuits and Power Calculations

This video tutorial explains how to solve DC circuits with parallel resistors. It covers calculating the current through each resistor using Ohm's Law, determining the power absorbed by each resistor, and calculating the total resistance in the circuit. The tutorial also includes an example with three resistors, demonstrating the application of these concepts.

What is the current flowing through a 4-ohm resistor when the voltage across it is 12 volts?

• 4 amps

• 2 amps

• 3 amps

• 1 amp

How much power is absorbed by a resistor with a current of 3 amps and resistance of 4 ohms?

• 48 watts

• 12 watts

• 24 watts

• 36 watts

What is the total power delivered by a battery if it provides 12 volts and 5 amps?

• 70 watts

• 60 watts

• 50 watts

• 30 watts

How can you calculate the total resistance in a parallel circuit with known total current and voltage?

• Multiply voltage by current

• Subtract current from voltage

• Divide voltage by current

• Add voltage and current

In a parallel circuit, what happens to the total resistance when a new resistor is added?

• It increases

• It decreases

• It doubles

• It remains the same

What is the current through a 3-ohm resistor when connected to a 24-volt battery?

• 10 amps

• 8 amps

• 6 amps

• 4 amps

According to Kirchhoff's Current Law, what must be true at a junction in a circuit?

• Resistance entering equals resistance leaving

• Power entering equals power leaving

• Voltage entering equals voltage leaving

• Current entering equals current leaving

How much power is consumed by a 4-ohm resistor with 24 volts across it?

• 96 watts

• 144 watts

• 192 watts

• 240 watts

What is the equivalent resistance of a parallel circuit with resistors of 3, 4, and 8 ohms?

• 4.41 ohms

• 1.41 ohms

• 2.41 ohms

• 3.41 ohms

What is the total power delivered by a 24-volt battery with a total current of 17 amps?

• 504 watts

• 304 watts

• 204 watts

• 408 watts