ECT UNIT 1 - MCQ

In a series circuit with three resistors (5Ω, 10Ω, 15Ω), what is the total resistance?

• 10Ω

• 15Ω

• 30Ω

• 5Ω

What does Ohm's Law state?

• Current is inversely proportional to voltage.

• Voltage is equal to resistance times current.

• Power is equal to voltage divided by current.

• Resistance is equal to current times power.

A 24V battery is connected across a 6Ω resistor. What is the current flowing through the resistor?

• 2A

• 4A

• 6A

• 8A

Kirchhoff's Voltage Law (KVL) is based on the law of:

• Energy conservation

• Charge conservation

• Induction

• Resistance

In a parallel circuit with resistors of 6Ω and 3Ω, what is the equivalent resistance?

• 2Ω

• 9Ω

• 4Ω

• 1.5Ω

What happens to the current in other branches when one branch of a parallel circuit is disconnected?

• It increases

• It decreases

• It remains the same

• It becomes zero

Convert a star network with three equal resistors of 3Ω into a delta network. What is each delta resistance?

• 3Ω

• 6Ω

• 9Ω

• 4.5Ω

Which method is best suited for analyzing circuits with multiple loops?

• Node analysis

• Mesh analysis

• Ohm's law

• Star-delta transformation

If a voltage source is in series with a resistor, it can be converted to:

• A voltage divider

• A current source in parallel with the resistor

• An open circuit

• A capacitor

In node analysis, what is the main variable calculated?

• Resistance

• Voltage at each node

• Current in each mesh

• Power loss