Electrical Circuit Theorems Quiz

A linear circuit has a current i = 5 A when the input voltage is v = 10 V. If v is increased to 30 V, what is the new value of i?

• 10 A

• 15 A

• 20 A

• 25 A

The superposition theorem is NOT applicable to calculating:

• Voltage across a resistor

• Current through a capacitor

• Power dissipated by a resistor

• Voltage across an inductor

In Thevenin's theorem, VTH represents:

• Short-circuit current at the terminals

• Open-circuit voltage at the terminals

• Equivalent resistance at the terminals

• Norton's equivalent current

What is the primary purpose of Norton's theorem?

• To simplify a complex circuit into a voltage source and series resistance

• To simplify a complex circuit into a current source and parallel resistance

• To find the maximum power transfer to a load

• To analyze non-linear circuits

For maximum power transfer to occur, what should be the relationship between the load impedance (ZL) and the Thevenin impedance (ZTH)?

• ZL = ZTH

• ZL = |ZTH|

• ZL = ZTH* (complex conjugate)

• ZL = 1/ZTH

Which theorem is based on the principle of linearity?

• Maximum Power Transfer Theorem

• Norton's Theorem

• Superposition Theorem

• Millman's Theorem

Millman's Theorem is particularly useful for simplifying circuits with:

• Multiple voltage sources in series

• Multiple current sources in series

• Multiple voltage sources in parallel with series resistances

• Single voltage source and single resistance

If a circuit contains only independent sources, and you are finding the Thevenin equivalent resistance, what do you do with the independent sources?

• Short-circuit all voltage sources and open-circuit all current sources

• Open-circuit all voltage sources and short-circuit all current sources

• Leave all sources as they are

• Replace all sources with their internal resistance

A network N is connected to a load RL. For maximum power transfer to RL, the resistance of the network as viewed from RL must be:

• Zero

• Infinite

• Equal to RL

• Equal to the square root of RL

When applying the superposition theorem, how are independent current sources treated when considering the effect of a single independent voltage source?

• They are replaced with short circuits.

• They are replaced with open circuits.

• They are left unchanged.

• They are replaced with their internal resistance.