Mahindra & Mahindra Senior Electrical Engineer Interview Questions and Answers

Home's law is a principle that states that the current flowing through a conductor is directly proportional to the voltage applied across it.

• Home's law is also known as Ohm's law.

• It is expressed as I = V/R, where I is the current, V is the voltage, and R is the resistance.

• This law is fundamental to the study of electrical circuits and is used to calculate the behavior of circuits.

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

The current unit is the ampere (A), which measures the flow of electric charge.

• The unit of electric current is the ampere (A).

• Current is the rate of flow of electric charge.

• It is measured using an ammeter.

• One ampere is equal to one coulomb of charge passing through a point in one second.

Voltage is the unit of measurement for electric potential difference.

• Voltage is the force that pushes electric charges through a circuit.

• It is measured in volts (V).

• Voltage is essential for the operation of electrical devices.

• Examples of voltage units include millivolts (mV), kilovolts (kV), and megavolts (MV).

Ohm's law states that the current flowing through a conductor is directly proportional to the voltage applied across it.

• Ohm's law is expressed as V = I * R, where V is the voltage, I is the current, and R is the resistance.

• The current symbol is represented by the letter 'I'.

• Ohm's law is fundamental in understanding and analyzing electrical circuits.

• Example: If a circuit has a voltage of 12 volts and a resistance of 4 o...read more

The two types of winding in electrical engineering are lap winding and wave winding.

• Lap winding is used in DC machines and is characterized by multiple parallel paths for current flow.

• Wave winding is used in AC machines and is characterized by a single path for current flow.

• Lap winding provides high current capacity and low voltage output, while wave winding provides low current capacity and high voltage output.

• In lap ...read more

The primary winding is the first coil in a transformer that receives electrical energy.

• The primary winding is typically connected to the power source.

• It is responsible for receiving and transmitting electrical energy to the secondary winding.

• The number of turns in the primary winding determines the voltage ratio between the primary and secondary sides.

• Primary windings are commonly found in transformers, induction motor

The boost pressure sensor measures the pressure of the air entering the engine to ensure optimal performance.

• Measures pressure of air entering engine

• Helps ensure optimal engine performance

• Sends data to engine control unit for adjustments

• Commonly found in turbocharged engines

The crankshaft sensor detects the position and speed of the crankshaft in an engine.

• Provides information to the engine control module to determine ignition timing and fuel injection timing

• Helps diagnose engine problems by detecting misfires and other issues

• Used in conjunction with the camshaft sensor to synchronize engine operation

• Examples of engines that use crankshaft sensors include gasoline and diesel engines

I worked as an electrician at XYZ company for 3 years.

• Installed and maintained electrical systems in commercial and residential buildings

• Troubleshot and repaired electrical issues

• Collaborated with team members to complete projects on time and within budget

• Ensured compliance with safety regulations and codes

• Provided excellent customer service and communication

A capacitor is an electronic component that stores and releases electrical energy. A transistor is a semiconductor device that amplifies or switches electronic signals. A variable frequency drive is an electronic device that controls the speed of an electric motor.

• A capacitor is used to store and release electrical energy.

• It consists of two conductive plates separated by an insulating material called a dielectric.

• When ...read more

To change AC to DC current in a DC motor, a rectifier is used. The commutator in a DC motor helps in converting the current direction.

• AC to DC conversion in a DC motor is achieved using a rectifier.

• The rectifier converts the alternating current (AC) into direct current (DC) by using diodes.

• The commutator in a DC motor is a rotary electrical switch that helps in reversing the direction of current flow in the armature wi...read more

Current is the flow of electric charge in a circuit.

• Current is measured in amperes (A).

• It is caused by the movement of electrons or other charged particles.

• Current can flow in both directions in an alternating current (AC) circuit.

• In a direct current (DC) circuit, current flows in only one direction.

• The magnitude of current is determined by the voltage and resistance in the circuit.

• Ohm's Law states that current is equa

DC current stands for Direct Current, which is the flow of electric charge in a single direction.

• DC current is characterized by a constant and steady flow of electrons in one direction.

• It is commonly produced by batteries, solar cells, and power supplies.

• Unlike AC (Alternating Current), DC current does not change its direction periodically.

• DC current is used in various applications such as powering electronic devices, ...read more