⚡ Electrical Engineering Solved MCQs with Answers

Practice 757 approved ⚡ Electrical Engineering questions with verified answers from the 🛠️ Engineering Essentials subject for Pakistan exams.

757 solved MCQs

Alternating voltage is an example of which type of signal?Answer: Analog In optical communication, the carrier is ______.Answer: Electromagnetic waves in optical frequency Rectangular voltage is an example of ______.Answer: Digital signal Voltage influences current only if the circuit is ______.Answer: Closed A voltmeter is used across ______.Answer: Parallel The phasor 14∠−j5 is in the ______ quadrant.Answer: 4th Quadrant The depletion region in a PN semiconductor consists of ______.Answer: Immobile donor and acceptor ions When the frequency of the voltage applied to a series RC circuit is increased, the phase angle ______.Answer: Decreases In a series RC circuit, when the frequency and the resistance are halved, the impedance ______.Answer: Can't be determined The voltages in Problem 4 are measured at a certain frequency. To make the capacitor voltage greater than the resistor voltage, the ______ should be changed.Answer: Frequency should be decreased In practical applications, battery voltage ______ as the load increases.Answer: Decreases AC–DC conversion is called ______.Answer: Rectification A DC–AC conversion device is called a ______.Answer: Inverter A sudden increase in the total current into a parallel circuit may indicate an increase in source ______.Answer: Voltage Primary batteries, unlike secondary batteries, may be ______.Answer: Used once The complex number 4 + j3 lies in which quadrant?Answer: 1st Quadrant Electric current is ______.Answer: Coulomb / time To implement various logic circuits in electronics, the devices used are called ______.Answer: Logic gates If the current in a circuit is 0 A, the circuit is likely to be ______.Answer: Open Rectification is obtained by ______.Answer: Passing an AC signal through a diode A strong electric field across a PN junction causes breakdown due to ______.Answer: Avalanche breakdown One coulomb of charge passing through a conductor in one second is equal to ______.Answer: One ampere Current flow in a PN semiconductor is mainly due to ______.Answer: Majority carriers An example of stored electrical potential energy is a ______.Answer: Battery Power transformer transforms?Answer: Voltage In order to have a lower cost of electrical energy generation:Answer: High load factor and diversity factor A 100-volt bulb has a resistance of 500 ohms. The number of hours it can work for every kWh of energy consumed will be:Answer: 50 A superconductor may be used for generating:Answer: Magnetic field Unit of Potential difference is___:Answer: Volt The unit of Electric Energy is _____:Answer: Joule