EGEL-IELECTRO: Essential Practice Questions with Answers & Rationales

EGEL-IELECTRO: Essential Practice Questions
with Answers & Rationales




SECTION 1: DC CIRCUIT ANALYSIS & NETWORK THEOREMS


Q1. A path between two or more points along which an electrical current can be carried is called a:
- A. network

,- B. relay
- C. circuit
- D. loop


Answer: C. circuit


Rationale: A circuit is a closed path that allows current to flow, consisting of interconnected elements . A network is a more general
interconnection of elements, but a "circuit" specifically provides a path for current.




Q2. In a simple DC circuit with a constant voltage, if resistance increases, current will:
- A. decrease
- B. stop
- C. increase
- D. remain constant


Answer: A. decrease


Rationale: Ohm's Law states I = V/R. With V constant and R increasing, current must decrease proportionally .

,Q3. The formula for electrical current is:
- A. Voltage / Resistance
- B. Resistance × Voltage
- C. Voltage + Resistance
- D. Resistance / Voltage


Answer: A. Voltage / Resistance


Rationale: According to Ohm's Law, I = V/R. Current flows when there is a potential difference (voltage) across a resistance .




Q4. Electric current is the flow of which of the following?
- A. Neutrons
- B. Photons
- C. Electrons
- D. Quarks


Answer: C. Electrons

, Rationale: Electric current is the flow of electrons from a negative polarity to a more positive polarity .




Q5. Which of the following is a unit of electrical resistance?
- A. Volt
- B. Amp
- C. Ohm
- D. Coulomb


Answer: C. Ohm


Rationale: The ohm (Ω) is the SI unit of electrical resistance. Volt is unit of potential, Amp is current, and Coulomb is charge .




Q6. What type of circuit has some load elements in series in addition to elements in parallel?
- A. Parallel Circuit
- B. Series-Parallel
- C. Wye-series Circuit