Sai Marketing Interview Questions and Answers

Faraday's law of electromagnetism states that a changing magnetic field induces an electromotive force in a conductor.

• An electromotive force is induced in a conductor when there is a change in magnetic field strength or orientation.

• This phenomenon is the basis for the operation of generators and transformers.

• Faraday's law is mathematically represented as E = -dΦ/dt, where E is the induced electromotive force and Φ is the magnetic flux.

• The negative sign indicates that the indu...read more

A motor is a device that converts electrical energy into mechanical energy to produce motion.

• Motors can be found in various applications such as electric vehicles, industrial machinery, and household appliances.

• There are different types of motors including DC motors, AC motors, and stepper motors.

• Motors work based on the principle of electromagnetic induction, where a magnetic field interacts with current to generate motion.

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

• Transformers are commonly used to step up or step down voltage in electrical systems.

• They consist of two coils of wire, known as the primary and secondary coils.

• Examples of transformers include power transformers used in electrical substations and voltage transformers in electronic devices.

A generator is a device that converts mechanical energy into electrical energy.

• Converts mechanical energy into electrical energy

• Commonly used in power plants, homes, and businesses

• Examples include diesel generators, wind turbines, and hydroelectric generators

A rectifier is an electrical device that converts alternating current (AC) to direct current (DC).

• Converts AC to DC

• Used in power supplies

• Types include half-wave, full-wave, and bridge rectifiers

An inverter is a device that converts direct current (DC) to alternating current (AC) for use in electrical appliances.

• Converts DC to AC power

• Used in solar power systems to convert DC power from solar panels to AC power for use in homes

• Commonly used in cars to power electronic devices