Description : What is the need for electrically isolated drive circuits?
asked
Mar 11, 2018
by
anonymous
Description : The synchronous motor which works on leading power factor and does not drive any mechanical load is called?
Answer :
The synchronous motor which works on leading power factor and does not drive any mechanical load is called synchronous condenser.
asked
Mar 18, 2018
by
anonymous
Description : Can a power surge erase a hard drive?
asked
Mar 10, 2018
by
anonymous
Description : Explain MOSFET gate drive circuit and totem pole configuration.
Answer :
MOSFET gate drive circuit: The turning on and turning off of MOSFET can be controlled from gate to source voltage signal. If the gate to source voltage of MOSFET exceeds threshold ... this configuration, the two switches (transistors) are used in totem pole arrangement with a comparator.
asked
Feb 19, 2018
by
anonymous
Description : Explain open emitter BJT drive circuit.
Answer :
open emitter BJT drive circuit:
asked
Feb 19, 2018
by
anonymous
Description : Explain DC coupled drive circuit with unipolar output.
Answer :
DC coupled drive circuit with unipolar output: The figure shows the circuit and waveforms
asked
Feb 19, 2018
by
anonymous
Description : Explain thyristor gate drive circuit.
Answer :
Thyristor Gate Drive Circuit: The thyristor can be turned on by pulse voltage signal at gate terminal and it does not require continuous drive signal like the transistor. The gate ... circuit provide required minimum gate voltage and gate current then the thyristor conducts properly.
asked
Feb 19, 2018
by
anonymous
Description : Explain different gate drives techniques with base circuits and key features.
asked
Mar 10, 2018
by
anonymous
Description : What are the fundamental requirements of gate drive ICs?
asked
Mar 11, 2018
by
anonymous
Description : basic gate drive circuit of GTO
Answer :
basic gate drive circuit of GTO
asked
Nov 14, 2017
by
anonymous
Description : What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage: (A) Eddy Current and Hysteresis losses will be excessive (B) Current will be too much high (C) Transformer may start to smoke and burn (D) No effect
Answer :
What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage: (A) Eddy Current and Hysteresis losses will be ... will be too much high (C) Transformer may start to smoke and burn (D) No effect
asked
May 8, 2018
by
anonymous
Description : A transformer has negative voltage regulation when its load power factor is (1) Zero (2) Unity (3) Leading (4) Lagging
Answer :
Leading
asked
Apr 30, 2018
by
anonymous
Description : To protect the power transformer (Y-Y with neutral grounded) against fault, what type of connection do the CTs have ?
Answer :
To protect the power transformer (Y-Y with neutral grounded) against fault, what type of connection do the CTs have ? Δ-Δ connection
asked
Apr 27, 2018
by
anonymous
Answer :
The power transformer is a constant main flux device.
asked
Mar 19, 2018
by
anonymous
Answer :
In a power or distribution transformer about 10 percent end turns are heavily insulated to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns.
asked
Mar 19, 2018
by
anonymous
Description : The maximum load that a power transformer can carry is limited by its?
Answer :
The maximum load that a power transformer can carry is limited by its voltage ratio.
asked
Mar 19, 2018
by
anonymous
Description : For a signal conditioner explain the terms linearization and signal conversion.
Answer :
Definition : 1. linearization : Many primary elements produce nonlinear outputs and the signal must be linearized to produce a nearly ideal calibration. Specialized analog circuits such as offsetting circuits, ... signal. Even computer algorithms are also used. 2.Signal conversion :
asked
Jul 21, 2019
by
anonymous
Description : Explain the concept of initial and final conditions in switching circuits for elements R and L.
Answer :
Concept of Initial and final condition in switching circuits for R: Consider a resistor is connected to a voltage source, using a switch as shown in fig below The switch is closed ... of value Io in parallel with short circuit.(I0 is the current in inductor just before switching)
Description : Explain with neat diagram series and parallel magnetic circuits.
Answer :
Series magnetic circuit: When different magnetic materials having different lengths, cross sectional areas and permeability are connected one after another, in which same flux is established in different sections, then it is called series ... flux, Φ = Φ1 + Φ2 Path 1: BAFE Path 2: BACD
asked
Apr 27, 2020
by
anonymous
Description : What is the significance of signal conditioner? Explain the need of following in mechatronics system. i) Isolator ii) Filter iii) Amplifier iv) Data converter
Answer :
Significance: Signal conditioning means manipulating an analog signal in such a way that it meets the requirements of the next stage for further processing. Signal inputs accepted by signal ... -frequency converters, current-to-voltage converters, current loop converters, and charge converters.
asked
Aug 9, 2019
by
anonymous
Description : What is the difference between AC and DC drive?
Answer :
AC means alternating current It's Frequency is 50hz Dc means direct current ItsI Frequency is 0Hz
asked
Mar 10, 2018
by
anonymous
Description : Adjustable-speed drive
Answer :
.embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
asked
Jul 6, 2019
by
anonymous
Description : In an adjustable speed ac drive which quantity gets reduced above rated speed ? (A) developed torque (B) stator frequency (C) reduced starting torque (D) stator current
Answer :
In an adjustable speed ac drive which quantity gets reduced above rated speed ? (A) developed torque (B) stator frequency (C) reduced starting torque (D) stator current
asked
Apr 28, 2018
by
anonymous
Answer :
For constant torque drive armature voltage control speed control method is preferred.
asked
Mar 20, 2018
by
anonymous
Description : What is an electric motor drive?
asked
Mar 10, 2018
by
anonymous
Description : What is a drive in electrical controls?
asked
Mar 10, 2018
by
anonymous
Description : What does an electric drive do?
asked
Mar 10, 2018
by
anonymous
Description : Scherbius Drive System
Answer :
Scherbius Drive System
Description : Kramer Drive System
Answer :
Kramer Drive System Kramer drive is a rotor side speed control drive of induction motor. Slip is the difference between synchronous speed and rotor speed. It is the ... and DC motor. The static Kramer drive is costlier because of the cost of DC motor.
Description : Advantages of Variable Frequency Drive (VFD)
Answer :
Advantages of Variable Frequency Drive (VFD)
Description : Explain the electrical losses of magnetic materials used for the cores of inductors and transformer.
asked
Mar 10, 2018
by
anonymous
Answer :
The purpose of providing an iron core in a transformer is to decrease the reluctance of the magnetic path.
asked
Mar 19, 2018
by
anonymous
Answer :
The purpose of providing iron core in a step-up transformer is to decrease the magnitude of magnetizing current.
asked
Mar 19, 2018
by
anonymous
Description : Explain the single pass transformer design procedure step by step by giving its flowchart.
Answer :
single pass transformer design procedure step by step by giving its flowchart:
asked
Mar 10, 2018
by
anonymous
Description : Explain the electrical characteristics of transformer.
Answer :
Transformer electrical characteristics: Area of primary and secondary conductors, Apri and Asec: Winding loss Pw: Flux density and core loss: Leakage inductance: ... transformer span. The rise in temperature may breakdown insulation which may cause failure of the transformer.
asked
Mar 10, 2018
by
anonymous
Description : State different types of electrical signal and draw all types of waveforms.
Answer :
Types of electrical signals 1) Sine wave 2) Triangular wave 3) Square wave Waveforms
asked
May 2, 2020
by
anonymous
Description : If it takes a transmitted signal 1m sec to go up to the target and come back after reflection, how far is the transmitter from the target? A) 150 Km B) 150 m C) 15 Km D) 1500 m
Answer :
If it takes a transmitted signal 1m sec to go up to the target and come back after reflection, how far is the transmitter from the target? A) 150 Km B) 150 m C) 15 Km D) 1500 m
asked
Jun 18, 2018
by
anonymous
Description : What do you mean by signal and system?
asked
Mar 11, 2018
by
anonymous
Answer :
Because it has a higher switching frequency and heat tolerance.
asked
Sep 15, 2017
by
anonymous
Description : Compare Asynchronous sequential and synchronous sequential circuits.
Answer :
SR. NO. ASYNCHRONOUS SEQUENTIAL CIRCUIT SYNCHRONOUS SEQUENTIAL CIRCUITS. 1 Output can be changed at any instant of time by changing the input Output changes at discrete ... the counter change state simultaneously. This is because all the flip-flops are clocked simultaneously.
asked
Jul 21, 2019
by
anonymous
Description : basic characteristics of sound signal.
Answer :
Level and loudness: The amplitude of a sound wave determines its loudness or volume. A larger amplitude means a louder sound, and a smaller amplitude means a softer sound. The loudness of a ... the reproducing system should be capable of handling the maximum and minimum power in the same ratio.
asked
Sep 2, 2019
by
anonymous
Description : List different methods of demodulation of FM signal.
Answer :
Balanced Slope detection Ratio detector Foster Seeley discriminator Phase locked loop demodulator
asked
Aug 3, 2019
by
anonymous
Description : Analog signal
Answer :
.embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
asked
Jul 6, 2019
by
anonymous
Description : In 8085, whenever a signal is received at TRAP terminal, its program execution is transferred to a subroutine on address A) 0000 H B) 002C H C) 0024 H D) 0004 H
Answer :
In 8085, whenever a signal is received at TRAP terminal, its program execution is transferred to a subroutine on address 0024 H
asked
Jun 18, 2018
by
anonymous
Description : If a signal band limited to fm is sampled at a rate less than 2fm, then the constructed signal will be A) Large in amplitude B) Small in amplitude C) Distorted D) Distortion less
Answer :
If a signal band limited to fm is sampled at a rate less than 2fm, then the constructed signal will be Distorted
asked
Jun 18, 2018
by
anonymous
Description : The sampling rate to avoid aliasing for the signal m(t) = 100 cos 200ωt will be A) ≥1/25 sec B) ≥1/50 sec C) ≤1/25 sec D) ≤ 1/50 sec
asked
Jun 18, 2018
by
anonymous
Description : An energy signal has G(f) = 20. Its energy density spectrum is A) 20 B) 100 C) 400 D) 800
Answer :
An energy signal has G(f) = 20. Its energy density spectrum is 400
asked
Jun 18, 2018
by
anonymous
Description : What is the Laplace transform of step signal of 5 units magnitude? A) 5s B) 5/s C) s/5 D) 1/s
Answer :
What is the Laplace transform of step signal of 5 units magnitude? A) 5s B) 5/s C) s/5 D) 1/s
asked
Jun 18, 2018
by
anonymous
Description : The time base signal in Cathode Ray Oscilloscope (CRO) is (1) A square wave signal (2) A sawtooth signal (3) A triangular wave signal (4) A sinusoidal signal
Answer :
2 Saw tooth
asked
May 1, 2018
by
anonymous
Description : Integration of step signal gives (A) Impulse signal. (B) Ramp function. (C) Parabola. (D) Square pulse.
Answer :
Integration of step signal gives Ramp function.
asked
Apr 28, 2018
by
anonymous