⚡ 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

Crank Nicholson method is a technique to solve numerically which of the following type of equations?Answer: Nonlinear partial differential equations The Fourier series expansion of an even period function contains?Answer: Cosine terms A homogeneous differential equation of the form M(x, y) dx + N(x, y) dy = 0 can be reduced to a differential equation with separated variables by using the substitution?Answer: y = vx, dy = vdx + xdv The principle of transformer is _____?Answer: Mutual induction In Ampere's law, the integration is over a ______?Answer: Closed path The substances which can be strongly magnetized are called _______?Answer: Paramagnetic A rheostat can be used as a _____?Answer: Both A and B A PN junction can be used as _____?Answer: Rectifier Transformer obeys the Law of Conservation of ______?Answer: None of these Brushes used in a generator are commonly made up of _____?Answer: Carbon An inductor coil may appear like a _____?Answer: Solenoid Which one of the following cannot be measured with an Avometer?Answer: Inductance Magnetic field used in a moving coil galvanometer is _____?Answer: Radial Magnetic field inside the solenoid along its axis _______?Answer: Strong and uniform Resistors used in most electronic devices are made of ______?Answer: Carbon Heating effect caused by an electric circuit is written as ______?Answer: H=I^2Rt Drift velocity of an electron is ______?Answer: 10^-3 m/sec If the current in an electric bulb decreases by 0.5% then the power in the bulb decreases by approximately ______?Answer: 1% When 4 equal resistors are connected in series with a battery they dissipate power of 10W. The power dissipated through any of them if connected across the same battery will be _____?Answer: 40 W When a substance was heated, its conductivity was increased, what should it be out of the following?Answer: Semi-conductors If the plates of a charged parallel plate capacitors are pulled away from each other ______?Answer: Voltage decreases A particle A has a charge +q and particle B has a charge +4q with each of them having the same mass m. When allowed to fall from rest through the same electrical potential difference, the ratio of their speed VA : VB will become _____?Answer: 1:2 A resistor of 4kΩ with tolerance 10% is connected in parallel with a resistor of 6 kΩ with tolerance 10%. The tolerance of the parallel combination is nearly ______?Answer: 10% The range of the coulomb's force is _____?Answer: Infinite If the distance between the charges doubles, the coulomb's force between the charges _____?Answer: One-fourth An isotope is _____?Answer: An atom with a specified number of protons and neutrons Phase difference between a node and an antinode is _____?Answer: 90° The dependence of the mobility of charge carriers in a semiconductor is given by _____?Answer: μ ∝ 1/T¹/² Ferromagnetic materials are obtained from _____?Answer: Nickel Which of the following is the correct relation between current density and magnetization?Answer: J = Curl(M)