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What is the effect of a decrease in the load for a DC motor?

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What is the effect of a decrease in the load for a DC motor?

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What is the effect of an increase in the load for a DC motor?

What is the effect of an increase in the load for a DC motor?
Answer : When the load on a DC motor increases, several things happen that affect the motor's performance: 1. **Decrease in Speed**: As the load increases, the motor has to work harder to overcome the ... DC motor, it works harder, slows down, and draws more power to keep up with the extra demand....

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Explain the effect of variable excitation on the behaviour of synchronous motor under constant load condition.

Explain the effect of variable excitation on the behaviour of synchronous motor under constant load condition.
Answer : The excitation in a synchronous motor refers to the direct current (DC) supplied to its field winding. This excitation determines the strength of the magnetic field produced by the rotor ... in optimizing the motor's performance, especially in power factor correction and reactive power management....

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A motor has to exert power starting from zero and rising uniformly to 150 HP in 8 mins after which it works at constant power of 100 HP for 5 mins. The motor remains on no load for next 5 mins. The cycle again starts and repeats indefinitely. Determine suitable size of motor.

A motor has to exert power starting from zero and rising uniformly to 150 HP in 8 mins after which it works at constant power of 100 HP for 5 mins. The motor remains on no load for next 5 mins. The cycle again starts and repeats indefinitely. Determine suitable size of motor.

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in Electrical Engineering

Why does my DC motor not start on no load?

Why does my DC motor not start on no load?

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DC series motor should never be started at no load. Justify.

DC series motor should never be started at no load. Justify.

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Why does current decrease when voltage increases in a capacitor?

Why does current decrease when voltage increases in a capacitor?
Answer : When voltage increases across a capacitor, the current initially decreases due to the nature of how capacitors work. Here's a simple explanation: A capacitor stores electrical energy in the form of an ... ," making it harder for more current to flow as it gets closer to being fully charged....

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Illustrate Energy conservation in motor by load matching and operating in star mode.

Illustrate Energy conservation in motor by load matching and operating in star mode.

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Why does the resistance of insulators decrease with an increase in temperature?

Why does the resistance of insulators decrease with an increase in temperature?

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Why does an increase in temperature decrease resistance?

Why does an increase in temperature decrease resistance?

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Why does resistance decrease with an increase in temperature in semiconductors?

Why does resistance decrease with an increase in temperature in semiconductors?

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Why does resistance decrease with an increase in temperature?

Why does resistance decrease with an increase in temperature?

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What is the effect of a capacitor in a DC circuit?

What is the effect of a capacitor in a DC circuit?
Answer : In a DC circuit, the effect of a capacitor can be understood in a few key stages: during the charging phase, steady-state, and discharging phase. 1. **During the Charging Phase**: When a ... it when needed, which makes it useful for filtering, smoothing signals, and energy storage in DC circuits....

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What is the effect of inductance in a DC circuit?

What is the effect of inductance in a DC circuit?
Answer : In a DC circuit, inductance mainly has an impact during the transient period, which is the time when the circuit is adjusting to a change in current, such as when a switch is turned on or off ... no longer has a significant effect, and the current behaves normally as if the inductor were not there....

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What is the effect of self induction in a dc circuit ?

What is the effect of self induction in a dc circuit ?

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What effect does the induced voltage have on the current in a DC inductive circuit?

What effect does the induced voltage have on the current in a DC inductive circuit?

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Why does the terminal potential difference of a battery decrease when the current drawn from it is increased?

Why does the terminal potential difference of a battery decrease when the current drawn from it is increased?
Answer : Why does the terminal potential difference of a battery decrease when the current drawn from it is increased?...

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Why does the emf of a battery decrease as it is used?

Why does the emf of a battery decrease as it is used?
Answer : The electromotive force (emf) of a battery decreases as it is used because of internal resistance and chemical changes happening inside the battery. Here's a simple breakdown of why this happens: 1. ... is nearly drained, it can no longer produce the same voltage as when it was fully charged....

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in Electrical Engineering

Why does the electric field inside a dielectric decrease?

Why does the electric field inside a dielectric decrease?

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When a uniform resistance wire is stretched till its length becomes four times does it resistance increase or decrease?

When a uniform resistance wire is stretched till its length becomes four times does it resistance increase or decrease?

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When a uniform resistance wire is stretched till its length becomes four times does its resistance increase or decrease?

When a uniform resistance wire is stretched till its length becomes four times does its resistance increase or decrease?

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in Electrical Engineering

What is the formula for RPM of a DC motor?

What is the formula for RPM of a DC motor?

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Explain with the help of a neat diagram the following methods of speed control for a DC series motor: (i) Field diverter method. (ii) Tapped field method.

Explain with the help of a neat diagram the following methods of speed control for a DC series motor: (i) Field diverter method. (ii) Tapped field method.
Answer : ### Speed Control of DC Series Motor DC series motors are commonly used in applications where the motor needs to run at varying speeds, such as in cranes, electric trains, and ... given armature current, but they come with different complexities and impacts on the overall motor performance....

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in Electrical Engineering

Explain the necessity of a starter for a DC motor. State various types of DC motor starters.

Explain the necessity of a starter for a DC motor. State various types of DC motor starters.

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in Electrical Engineering

State at least one function and the material used for the following parts of a DC motor.

State at least one function and the material used for the following parts of a DC motor.
Answer : Here are the functions and materials for key parts of a DC motor: 1. **Armature**: - **Function**: The armature is the rotating part of the motor. It carries the current through the ... to minimize energy losses and improve efficiency. Let me know if you'd like more details on any part!...

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Why back emf used for a dc motor? highlight its significance.

Why back emf used for a dc motor? highlight its significance.
Answer : Back EMF (Electromotive Force) in a DC motor is the voltage generated by the motor's armature as it spins within a magnetic field. It is called "back" because it opposes the ... s current and power consumption, ensuring the motor runs smoothly without drawing excessive power or getting damaged....

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in Electrical Engineering

What is the effect of capacitor in DC?

What is the effect of capacitor in DC?

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What is the effect of inductor in DC circuit?

What is the effect of inductor in DC circuit?
Answer : In a DC (Direct Current) circuit, the behavior of an inductor can be understood in terms of how it interacts with current over time. Here's how an inductor behaves in a DC circuit: 1. ... first energized, but once the current reaches a steady state, the inductor no longer affects the current flow....

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in Electrical Engineering

What is the effect of inductor connected in AC and DC circuit?

What is the effect of inductor connected in AC and DC circuit?

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in Electrical Engineering

What is the effect of inductive reactance in an DC circuit?

What is the effect of inductive reactance in an DC circuit?

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What is the speed variation of the induction motor from no load to full load?

What is the speed variation of the induction motor from no load to full load?

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How does load affect the speed of an induction motor?

How does load affect the speed of an induction motor?

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Why series motor cannot be started on no-load?

Why series motor cannot be started on no-load?

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Why does the terminal voltage of cell decrease when current is drawn from it?

Why does the terminal voltage of cell decrease when current is drawn from it?
Answer : The terminal voltage of a cell decreases when current is drawn from it due to the **internal resistance** of the cell. Here's how it works: 1. **Internal Resistance**: Every cell or battery has ... to be "lost" as heat inside the cell, which results in a lower voltage available at the terminals....

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in Electrical Engineering

Why does Hall voltage decrease with temperature?

Why does Hall voltage decrease with temperature?
Answer : Hall voltage decreases with temperature primarily due to the following reasons: 1. **Increase in Carrier Scattering**: As the temperature increases, the number of lattice vibrations ( ... mobility, changes in carrier concentration, and the general effects of temperature on material properties....

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in Electrical Engineering

Do inductors increase or decrease voltage?

Do inductors increase or decrease voltage?

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How can voltage increase but current decrease?

How can voltage increase but current decrease?

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Why does insulation resistance decrease when temperatures increase?

Why does insulation resistance decrease when temperatures increase?

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Which DC motor is used for?

Which DC motor is used for?

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in Electrical Engineering

Give one application each for AC and DC servo motor.

Give one application each for AC and DC servo motor.

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What is the effect of supply voltage on the performance of an induction motor?

What is the effect of supply voltage on the performance of an induction motor?
Answer : The supply voltage has a significant impact on the performance of an induction motor. Here's how: ### 1. **Speed:** The speed of an induction motor is largely determined by ... crucial to provide the motor with the proper supply voltage to ensure optimal performance, efficiency, and longevity....

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in Electrical Engineering

Is AC DC a load line?

Is AC DC a load line?

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What is a DC load line?

What is a DC load line?

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Compare Horizontal axis and vertical axis wind machines on the basis of: (i) Power captured for the same tower height. (ii) Noise problem. (iii) Complexity of design and yaw mechanism (iv) Effect of fatigue arising from numerous resonances in structure.

Compare Horizontal axis and vertical axis wind machines on the basis of: (i) Power captured for the same tower height. (ii) Noise problem. (iii) Complexity of design and yaw mechanism (iv) Effect of fatigue arising from numerous resonances in structure.

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Is a Hall effect sensor AC or DC?

Is a Hall effect sensor AC or DC?

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What is DC load current?

What is DC load current?
Answer : **DC load current** refers to the amount of electric current that flows through a load (such as a resistor, motor, or any electrical device) when connected to a **direct current (DC) power ... the device will need, and it helps in selecting the right power supply and components for your circuit....

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in Electrical Engineering

Draw the phasor diagram for leading load of a transformer.

Draw the phasor diagram for leading load of a transformer.

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Draw the phasor diagram for lagging load of a transformer.

Draw the phasor diagram for lagging load of a transformer.
Answer : To draw a phasor diagram for a lagging load of a transformer, let's break down the components and their relationships. ### Step-by-Step Explanation: 1. **Transformer Primary ... . The precise angles and magnitudes would depend on the specific transformer characteristics and the load connected....

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Draw the phasor diagram for resistive load of a transformer.

Draw the phasor diagram for resistive load of a transformer.

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What is the effect of AC and DC on inductor?

What is the effect of AC and DC on inductor?

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What is the effect of inductance on DC current?

What is the effect of inductance on DC current?

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