20+ M R Jayaprakash & Associates Interview Questions and Answers

Rectifier converts AC to DC. Half wave, full wave and bridge rectifiers are commonly used.

• Rectifier is an electronic device that converts AC to DC.

• Half wave rectifier uses only one diode to convert AC to DC.

• Full wave rectifier uses two diodes to convert AC to DC.

• Bridge rectifier uses four diodes to convert AC to DC.

• Wheatstone bridge rectifier is a modified form of bridge rectifier.

• Circuit diagrams for all three types of rectifiers are available online.

Transistor is a semiconductor device used for amplification and switching of electronic signals.

• Transistor has three layers of semiconductor material - emitter, base, and collector.

• It works by controlling the flow of current between the collector and emitter using the base.

• NPN transistor has a P-type base sandwiched between two N-type layers.

• Symbol of NPN transistor has an arrow pointing outwards from the base.

• Transistors are widely used in electronic devices like amplifiers,...read more

Switchgear is an electrical equipment that controls, protects, and isolates electrical circuits.

• Switchgear is used to control power supply in electrical systems.

• It protects electrical equipment from damage caused by overloads, short circuits, and faults.

• Types of switchgear include low voltage, medium voltage, and high voltage switchgear.

• Relays are used in switchgear to control the flow of electricity.

• Types of relays include electromagnetic, thermal, and solid-state relays.

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Transformers are used to increase or decrease the voltage levels in electrical power transmission and distribution systems.

• There are two main types of transformers: step-up transformers and step-down transformers.

• Step-up transformers increase the voltage level, while step-down transformers decrease the voltage level.

• Other types of transformers ...read more

Structure is a user-defined data type that groups related data members, while union is a data type that allows storing different data types in the same memory location.

• Structures are used to group related data members of different data types, while unions are used to store different data types in the same memory location.

• Structures allocate memory for each data member, while unions allocate memory for the largest data member.

• Structures are accessed using the dot operator, whi...read more

A substance has resistance due to the opposition it offers to the flow of electric current.

• Resistance is caused by collisions between electrons and atoms in the substance.

• The resistance of a substance depends on its physical properties such as length, cross-sectional area, and temperature.

• Some substances have higher resistance than others, such as insulators compared to conductors.

• Resistance can be measured in ohms using Ohm's law.

In 5 years, I see myself as a senior engineer leading a team of talented individuals, working on cutting-edge projects and making significant contributions to the field.

• Leading a team of engineers

• Working on advanced projects

• Making significant contributions to the field

• Continuing professional development

• Building a strong network within the industry

SCR and TRIAC are semiconductor devices used for switching and controlling power in electronic circuits.

• SCR stands for Silicon Controlled Rectifier and is a four-layer PNPN semiconductor device used for power control applications.

• TRIAC stands for Triode for Alternating Current and is a three-layer PNPN semiconductor device used for AC power control applications.

• Both devices work by controlling the flow of current through them using a gate signal.

• SCR is a unidirectional device...read more

Time domain analysis involves studying the behavior of amplifiers, mosfets, and transistors over time.

• Time domain analysis is used to understand how a circuit behaves over time

• It involves analyzing the response of a circuit to a time-varying input signal

• In the case of amplifiers, mosfets, and transistors, time domain analysis can reveal important information about their stability and performance

• For example, it can be used to determine the bandwidth of an amplifier or the rise...read more

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

• Ohm's law is a fundamental principle in electrical engineering

• It states that the current through a conductor is directly proportional to the voltage across it

• The proportionality constant is the resistance of the conductor

• Ohm's law is often used to calculate the current, voltage, or resistance in a circuit

• For example, if the voltage across a re...read more

A program in C to reverse a string.

• Declare a character array to store the string.

• Use a loop to read the string and store it in the array.

• Use another loop to print the array in reverse order.

SMPS stands for Switched Mode Power Supply. Telecom industry refers to the sector that provides communication services.

• SMPS is a type of power supply that uses switching regulators to convert electrical power efficiently.

• Telecom industry includes companies that provide services such as voice and data communication, internet access, and wireless communication.

• Examples of telecom companies include AT&T, Verizon, and T-Mobile.

• SMPS is commonly used in telecom equipment to provide...read more

Faraday's law states that a changing magnetic field induces an electromotive force (EMF) in a conductor.

• Faraday's law is a fundamental principle of electromagnetism.

• It explains how electric generators work.

• The law states that the magnitude of the EMF induced is proportional to the rate of change of the magnetic field.

• It is used in many applications, including transformers, motors, and generators.

Oscillator generates an AC signal of a specific frequency. Types include RC, LC, crystal, and relaxation oscillators.

• An oscillator is an electronic circuit that generates a periodic AC signal.

• RC oscillator uses a resistor and capacitor to control the frequency.

• LC oscillator uses an inductor and capacitor to control the frequency.

• Crystal oscillator uses a quartz crystal to generate a precise frequency.

• Relaxation oscillator uses a nonlinear element like a transistor to generate...read more

Answers to technical questions related to electricity and circuit protection.

• Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

• A transformer is a device that transfers electrical energy from one circuit to another through electromagnetic induction.

• MCB (Miniature Circuit Breaker) is used to protect electrical circuits from overloads and short circuits, while RCCB (Residual Current Circuit Brea...read more

Electronics is the branch of physics and engineering that deals with the behavior and effects of electrons and with electronic devices.

• Electronics involves the study of electronic components such as diodes, transistors, and integrated circuits.

• It also involves the design and development of electronic circuits and systems for various applications.

• Electronics has a wide range of applications including telecommunications, computing, entertainment, and medical equipment.

• Examples ...read more

Cell grading is the process of evaluating and categorizing cells based on their characteristics and quality.

• Cell grading is commonly used in fields such as biology, medicine, and manufacturing.

• It involves assessing factors like cell size, shape, structure, and function.

• Grading cells can help determine their health, viability, and potential uses.

• For example, in medical diagnostics, cell grading may be used to classify cancer cells based on their aggressiveness.

Lithium ion batteries are rechargeable batteries commonly used in electronic devices.

• Lithium ions move from the negative electrode to the positive electrode during discharge

• They are lightweight and have a high energy density

• Commonly used in smartphones, laptops, and electric vehicles