Understanding Basic Electrical Concepts

How to express the Ohm's Law mathematically?

• V = R / I

• I = V + R

• V = I * R.

• R = V - I

In a series circuit, how does the total resistance compare to individual resistances?

• The total resistance is less than the smallest individual resistance.

• The total resistance is greater than the individual resistances.

• The total resistance is the same as the largest individual resistance.

• The total resistance is equal to the largest individual resistance.

What is the formula for calculating total resistance in a parallel circuit?

• R_total = R1 - R2 - R3 - ... - Rn

• R_total = R1 + R2 + R3 + ... + Rn

• R_total = R1 * R2 * R3 * ... * Rn

• 1/R_total = 1/R1 + 1/R2 + 1/R3 + ... + 1/Rn

Name three ideal basic circuit elements.

• Transformer, Diode, Switch

• Battery, Fuse, Circuit Breaker

• Resistor, Capacitor, Current Source

• Transistor, Relay, Voltage Regulator

What is the principle of energy conversion in electrical systems?

• The principle of energy conversion in electrical systems is the transformation of energy from one form to another, such as mechanical to electrical or electrical to mechanical.

• Energy conversion only occurs in thermal systems.

• Electrical systems do not involve energy transformation.

• Energy conversion is limited to chemical reactions.

How does voltage differ in series and parallel circuits?

• In series, voltage is divided; in parallel, voltage is the same across all components.

• In series, voltage increases with each component; in parallel, it decreases.

• In series, voltage remains constant; in parallel, it is divided.

• In series, voltage is the same across all components; in parallel, it is divided.

What happens to the total current in a parallel circuit when more branches are added?

• The total current increases.

• The total current decreases.

• The total current remains the same.

• The total current fluctuates randomly.

What is the relationship between power, voltage, and current in an electrical circuit?

• Power is the sum of voltage and current (P = V + I).

• Power is equal to voltage divided by current (P = V / I).

• Power is the difference between voltage and current (P = V - I).

• Power is the product of voltage and current (P = V * I).

Which of the following components can store electrical energy?

• Resistor

• Capacitor

• Inductor

• Both Capacitor and Inductor

What is the unit of electrical power?

• Volt

• Watt

• Ohm

• Joule