What is the phase angle and power factor of a pure inductor?

What is the purpose of a phase angle controller?
Answer : A **phase angle controller** is used to control the power delivered to a load, often in applications involving AC (alternating current) circuits. It works by adjusting the point in the AC ... pass, which is useful in many practical applications like dimming, motor speed control, and heating systems....

View solution

0 like 0 dislike

6 views 1 answer

in Electrical Engineering

How does a phase angle comparison relay work?

How does a phase angle comparison relay work?
Answer : A **phase angle comparison relay** is a protective relay used in electrical systems to detect phase angle differences between two or more signals, usually the voltages or currents of the system. ... relay will **trip** to prevent damage to equipment, ensuring the electrical system operates safely....

View solution

0 like 0 dislike

9 views 1 answer

in Electrical Engineering

What is the phase angle of RL series circuit?

View solution

0 like 0 dislike

4 views 0 answers

in Electrical Engineering

Write the expression of phase angle in terms of the reading of the 2 wattmeters in the two wattmeter method.

View solution

0 like 0 dislike

5 views 0 answers

in Electrical Engineering

Explain various cases of phase angle for 2 wattmeter method.

View solution

0 like 0 dislike

4 views 0 answers

in Electrical Engineering

What is Brewster angle phase?

What is Brewster angle phase?
Answer : The Brewster angle, also known as the polarization angle, is the angle of incidence at which light with a particular polarization is perfectly transmitted through a transparent dielectric surface ... and polarization effects become crucial for understanding how the light interacts with the surface....

View solution

0 like 0 dislike

4 views 1 answer

in Electrical Engineering

What is the difference between a pure sine wave and a modified sine wave inverter?

View solution

0 like 0 dislike

3 views 0 answers

in Electrical Engineering

Which has higher resistivity and alloy or a pure metal?

View solution

0 like 0 dislike

4 views 0 answers

in Electrical Engineering

Explain pure and doped semiconductor.

View solution

0 like 0 dislike

4 views 0 answers

in Electrical Engineering

A single phase wattmeter rated for 500 V; 5 A is having full scale deflection of 1000 watt. What is multiplying factor of the wattmeter?

View solution

0 like 0 dislike

3 views 0 answers

in Electrical Engineering

A 500kVA distribution transformer having copper and iron losses of 5kW and 3kW respectively on full load. The transformer is loaded as shown below: Loading (kW) Power Factor (Lag) No. of hours 400 0.8 06 300 0.75 12 100 0.8 03 No load - 03 Calculate the all-day efficiency.
Answer : To calculate the all-day efficiency of the transformer, we need to consider the total energy output, the total energy input, and the losses over a 24-hour period. The transformer experiences two types of ... \] ### Final Answer: The all-day efficiency of the transformer is approximately **98.39%**....

View solution

0 like 0 dislike

6 views 1 answer

in Electrical Engineering

What is a power factor, and why is it important?

View solution

0 like 0 dislike

6 views 0 answers

in Electrical Engineering

State the effects of low power factor on efficiency and voltage regulation of short transmission lines.

State the effects of low power factor on efficiency and voltage regulation of short transmission lines.
Answer : Low power factor in transmission lines can have a significant impact on the efficiency and voltage regulation of short transmission lines. Here's a breakdown of the effects: ### 1. * ... energy losses and poor voltage control, which reduces the overall performance of the transmission system....

View solution

0 like 0 dislike

5 views 1 answer

in Electrical Engineering

State the working principle and operation of automatic power factor controller used in transmission & distribution system.

View solution

0 like 0 dislike

2 views 0 answers

in Electrical Engineering

Identify the benefits and applications of availability-based tariff and power factor tariff.

View solution

0 like 0 dislike

2 views 0 answers

in Electrical Engineering

What is the difference between active and passive power factor correction?

View solution

0 like 0 dislike

4 views 0 answers

in Electrical Engineering

Is the power factor is same in star and delta connection?

View solution

0 like 0 dislike

5 views 0 answers

in Electrical Engineering

What is power factor real power and apparent power?

View solution

0 like 0 dislike

4 views 0 answers

in Electrical Engineering

Define Apparent power and Power factor.

View solution

0 like 0 dislike

6 views 0 answers

in Electrical Engineering

What is a pure sine wave inverter?

View solution

0 like 0 dislike

1 view 0 answers

in Electrical Engineering

Is Arduino pure C++?

Is Arduino pure C++?
Answer : Arduino isn't exactly pure C++, though it's very much based on C++ and shares many of its features. The Arduino programming environment uses a simplified version of C++ that is designed to ... code, it's more of a simplified, hardware-focused version designed for quick prototyping and ease of use....

View solution

0 like 0 dislike

11 views 1 answer

in Electrical Engineering

The power input to a 500V 50Hz 6Pole 3 phase induction motor running at 975 rpm is 40 kW. The stator losses are 1kW and friction and windage losses are 2kW. Calculate: (i) Slip (ii) Rotor copper loss (iii) Shaft power (iv) Efficiency

View solution

0 like 0 dislike

5 views 0 answers

in Electrical Engineering

What is the function of a series inductor in a power supply filter?

View solution

0 like 0 dislike

6 views 0 answers

in Electrical Engineering

What are the advantages of using an inductor in a power supply circuit?

View solution

0 like 0 dislike

5 views 0 answers

in Electrical Engineering

What is the primary purpose of an inductor in a power supply?

View solution

0 like 0 dislike

8 views 0 answers

in Electrical Engineering

What is a power inductor?

What is a power inductor?
Answer : A **power inductor** is a type of electronic component used to store energy in a magnetic field when electrical current flows through it. It's essentially a coil of wire, and when current ... inductor helps in managing energy in circuits by using its ability to create and control magnetic fields....

View solution

0 like 0 dislike

7 views 1 answer

in Electrical Engineering

A wedge-shaped thin glass plate of refractive index 1.52 is used to observe fringes of equal thickness. The fringe spacing is 1 mm and the wavelength of light used is 5893 Å. Calculate the angle of the wedge.
Answer : To calculate the angle of the wedge, we can use the formula for fringe spacing in a thin wedge-shaped air film. The formula for the fringe spacing \( \Delta x \) is given by: \[ \Delta x = \frac{\lambda}{ ... {-3}} \] Let's calculate it. The angle of the wedge is approximately \( 0.0111^\circ \)....

View solution

0 like 0 dislike

6 views 1 answer

in Electrical Engineering

Give the concept of firing angle and conduction angle with a neat waveform.

Give the concept of firing angle and conduction angle with a neat waveform.
Answer : ### Firing Angle and Conduction Angle: In power electronics, especially when discussing **phase-controlled rectifiers** (such as in thyristors or SCRs), the concepts of **firing angle** and ** ... **Conduction Angle (β):** The duration for which the thyristor remains on during the cycle....

View solution

0 like 0 dislike

5 views 1 answer

in Electrical Engineering

What is the difference between single-phase and three-phase power?

View solution

0 like 0 dislike

6 views 0 answers

in Electrical Engineering

What is the relation between power in 3 phase delta and star connected system?

View solution

0 like 0 dislike

4 views 0 answers

in Electrical Engineering

What is the purpose of a power factor meter?

View solution

0 like 0 dislike

3 views 0 answers

in Electrical Engineering

What is the significance of a power supply’s form factor?

View solution

0 like 0 dislike

5 views 0 answers

in Electrical Engineering

What is the purpose of a power factor protection scheme in capacitor banks?

View solution

0 like 0 dislike

1 view 0 answers

in Electrical Engineering

What is the power factor of a series RL circuit?

View solution

0 like 0 dislike

5 views 0 answers

in Electrical Engineering

Is a power factor of 0.8 good?

Is a power factor of 0.8 good?
Answer : A power factor of 0.8 means that 80% of the power is being used effectively, and 20% is wasted. In many industrial or commercial settings, a power factor of 0.8 is considered okay but not ... not optimal. Aiming for a power factor closer to 1 is usually preferred for efficiency and cost savings....

View solution

0 like 0 dislike

5 views 1 answer

in Electrical Engineering

What is the power factor of a half wave rectifier?

What is the power factor of a half wave rectifier?
Answer : The power factor of a half-wave rectifier is generally quite low. To explain this, let's break it down: 1. **Power Factor (PF)** is the ratio of **real power** (the power that ... rectifier is low (~0.287) due to the discontinuous nature of the current and the harmonic distortions it introduces....

View solution

0 like 0 dislike

6 views 1 answer

in Electrical Engineering

What is the purpose of a power factor correction (PFC) circuit?

View solution

0 like 0 dislike

8 views 0 answers

in Electrical Engineering

Explain the working principle of a power factor correction (PFC) circuit.

View solution

0 like 0 dislike

5 views 0 answers

in Electrical Engineering

What is a power factor penalty?

View solution

0 like 0 dislike

3 views 0 answers

in Electrical Engineering

What is a power factor correction capacitor?

What is a power factor correction capacitor?
Answer : A **power factor correction capacitor** is a device used to improve the power factor of an electrical system, particularly in AC (alternating current) circuits. ### What is Power Factor? Power ... the issue of poor power factor in electrical systems, making them more efficient and cost-effective....

View solution

0 like 0 dislike

8 views 1 answer