Envea Interview Questions, Process, and Tips

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Q2. What is different between circuit and network
Ans. 
Circuit is a closed loop of components while network is a collection of interconnected circuits.
• Circuit is a closed loop of components while network is a collection of interconnected circuits

• Circuits have a specific function or purpose, while networks can be used for various purposes

• Examples of circuits include a simple light bulb circuit, while examples of networks include the internet or a power grid
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Q3. What is difference between earthing and grounding
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Earthing is the process of connecting the non-current carrying part of the equipment to the earth, while grounding is the process of connecting the current carrying part of the equipment to the earth.
• Earthing is used to protect against fault currents and lightning strikes.

• Grounding is used to provide a path for fault currents to flow safely to the earth.

• Earthing is typically done by connecting the metal casing of elect...read more
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Q4. Draw the circuit diagram of oscillator
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An oscillator circuit generates a continuous output signal without any input signal.
• An oscillator typically consists of an amplifier and a feedback network.

• Common types of oscillators include LC oscillators, crystal oscillators, and relaxation oscillators.

• Example: A simple LC oscillator circuit consists of an inductor and a capacitor connected in parallel with an amplifier.
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Q5. Draw the sketch diagram and working of transformers
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Transformers are devices that transfer electrical energy between two or more circuits through electromagnetic induction.
• Transformers consist of two coils of wire, known as the primary and secondary coils, wrapped around a core typically made of iron or steel.

• When an alternating current flows through the primary coil, it creates a changing magnetic field which induces a voltage in the secondary coil.

• The ratio of the num...read more
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Q1. Explain working principle and losses in transformer
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Transformers work on the principle of electromagnetic induction, with losses including copper losses and core losses.
• Transformers work on the principle of electromagnetic induction, where a changing magnetic field induces a voltage in a coil.

• Copper losses occur due to resistance in the windings, leading to heat generation.

• Core losses include hysteresis losses (energy lost due to magnetization and demagnetization of the...read more
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Q2. Difference between motor and generator
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A motor converts electrical energy into mechanical energy, while a generator converts mechanical energy into electrical energy.
• Motor uses electricity to produce motion, while generator uses motion to produce electricity

• Motors are used in appliances like fans and refrigerators, generators are used in power plants

• Motors have a rotor that spins inside a stator, generators have a stator that surrounds a rotor
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Q3. What is corona loss in electrical network
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Corona loss in electrical network is the loss of power due to the ionization of air surrounding high voltage conductors.
• Corona loss occurs when the electric field around a conductor is high enough to ionize the air, creating a conductive path and causing power loss.

• It is more prominent at high voltages and frequencies, leading to audible noise, radio interference, and power loss.

• Corona loss can be reduced by increasing...read more
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Q4. What is synchronous motor
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A synchronous motor is a type of AC motor in which the rotation of the shaft is synchronized with the frequency of the supply current.
• Synchronous motors operate at a constant speed determined by the frequency of the electrical supply.

• They are used in applications where precise speed control is required, such as in industrial processes and power generation.

• Synchronous motors are more efficient than induction motors at h...read more
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Q5. Difference between circuit and network
Ans. 
A circuit is a closed loop of electrical components, while a network is a collection of interconnected circuits.
• Circuit is a closed loop of electrical components that allows current to flow.

• Network is a collection of interconnected circuits that work together to perform a specific function.

• Circuits can be simple, like a light bulb connected to a battery, or complex, like a computer motherboard.

• Networks can be local, li...read more
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Basic Electronics Aptitude test

Q1. Basic Electronics Questions
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