Electrical Engineering MCQs for competitive tests, job tests, university exams are provided on various Electrical and Electronics topics.
In case of DC machine, the torque depends on which of the below mentioned: Correct answer: 3. Both 1 and 2 Explanation: In a DC machine, the torque produced is given by the expression: T = (k⋅Φ⋅Ia)/Z where: From the expression, it’s evident that both armature current (Ia) and flux (Φ) play a role in … Read more
Of given options, the demagnetization effects which of the following: Correct answer: 3. Both 1 and 2 Explanation: Demagnetization is an outcome of armature reaction. Through vector addition, it is determined that demagnetization decreases or attenuates the primary field flux. Consequently, this leads to a reduction in the induced electromotive force (EMF) or terminal voltage … Read more
The necessary condition for voltage build-up in self excited generator is: Correct answer: 4. All of these Explanation: The necessary conditions for the voltage build-up process in a self-excited DC generator are as follows:
Electrical Engineering XYZ MCQ Wave winding is preferred in case of: Correct answer: 3. Low current and high voltage
DC machine windings are: Correct answer: 2. Full pitched Explanation: DC machine windings are full pitched windings, since full pitched windings offer maximum induced EMF in the coil.
Electrical Engineering XYZ MCQs In power system network the load is increasing, it represents the value of impedance: Correct answer: 3. Decrease Explanation: When the load in a power system network increases, it generally leads to a decrease in the impedance. Impedance is the total opposition that a circuit presents to the flow of alternating … Read more
The characteristic impedance of a transmission line is: Correct answer: 1. Independent of its length Explanation: The characteristic impedance (Z₀) of a transmission line is independent of its length. The characteristic impedance is a property of the transmission line itself and is determined by the ratio of the line’s distributed inductance per unit length to its distributed … Read more
Electrical Engineering MCQ In case of parallel transmission lines: Correct answer: 3. Both 1 and 2
Electrical Engineering MCQ The method of neutral grounding affects the: Correct answer: 1. Zero sequence network Explanation: The term system grounding refers to the electrical connection between the phase conductors and ground. Different types of groundings are given below: These methods of groundings affects the zero sequence network only.
Electrical Engineering MCQ When is the Ferranti effect on long overhead lines is observed when: Correct answer: 3. The line is lightly loaded Explanation: The Ferranti effect occurs in long overhead transmission lines when they are lightly loaded. It is a phenomenon related to the capacitance of the line. In a lightly loaded condition, the … Read more