Electrical and Electronics Engineering Interview Questions and Answers
Question - 11 : - Explain What Does A String Of Resistors In A Series Will Do?
Answer - 11 : -
When a string of resistors in a series will divide the source voltage into proportion to their values.
Question - 12 : - What Happens If The Series Current Double?
Answer - 12 : -
If the series current gets double then, the resistance is halved.
Question - 13 : - What Will Be The Current If The Resistance Total In A Series Circuit Doubles?
Answer - 13 : -
If the resistance total in a series circuit doubles the current will reduce to half.
Question - 14 : - Explain What Is Laser Diodes?
Answer - 14 : -
Laser diodes are compact transistor like packages with two or more electrical leads. Lasing occurs when stimulated emission results into the amplification of photon confined to the lasing mode. These photons hit back and forth between the back and front mirror, and hence a diverging beam emits from the laser diode packages.
Question - 15 : - What Is Meant By Cycle In Ac Waveform? What Is Period? Define Frequency?
Answer - 15 : -
One complete set of change in value is known as waveform. If you any basic question on AC waveform, then first draw an ac waveform and explain with reference to the waveform.
Question - 16 : - What Is Form Factor And Peak Factor?
Answer - 16 : -
The ratio of rms value to average value of an ac quantity is called form factor.
Form Factor = RMS value/ Average value
The ratio of maximum value to the RMS value of an ac quantity is called as peak factor.
Peak Factor = Maximum Value/RMS value
Question - 17 : - What Are The Basic Components Required For Generator Action To Exits?
Answer - 17 : -
A generating action requires following basic components to exits
- The conductor or a coil.
- The flux.
- The relative motion between conductor and flux.
Question - 18 : - Why Pole Shoe Has Been Given A Specific Shape?
Answer - 18 : -
It is necessary that maximum area of the armature comes across the flux produced by the field winding.
Pole shoe enlarges the area of armature core to come across the flux, which is necessary to produce larger induced emf. To achieve this, pole shoe has been given a particular shape.
Question - 19 : - Why Generators Are Operated In Parallel?
Answer - 19 : -
The generators are operated in parallel to get, Continuity and reliability of service without interruption Maintenance and repair will be easy Efficient operation of each generator Increase in plant capacity
Question - 20 : - What Are The Functions Of Yoke? What Is The Choice Material For The Yoke?
Answer - 20 : -
- It serves the purpose of outer most cover of the dc machine. so that the insulating material get protected from the harmful atmospheric environmental like noise, dust and various gases like SO2, acidic fumes etc.
- It provides mechanical support to the poles.
- It forms a part of the magnetic circuit.
- It provides a path of low reluctance for magnetic flux.
- It is prepared by using cast iron. For large machines, rolled steel, cast steel, silicon steel is used which provides high permeability.