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What else can I help you with?
Why variable voltage and variable frequency control is used instead of variable voltage?
variable voltage control has some limitations as you decrease the voltage corresponding phase current will increase lead to increase of flux which lead to saturation of motor core and heating of motor to make flux constant and vary speed of motor v/f ratio need to be maintained constant
If voltage constant when the current increases what does the resistance do?
In an electric circuit, ratio of current and voltage is constant which is known as the resistance of the circuit. If voltage or current is to be changed the resistance has to be changed. You cannot keep an invariable resistance in the circuit and increase current while keeping voltage as constant.Hence to vary the voltage or current in a circuit different equipments like rheostat,potentiometer are used.
What do you understand by regulation in a transformer?
Regulation of transformer means percentage reduction of transformer secondary voltage due to transformer loading as compared to its no load voltage.Another AnswerA transformer's voltage regulation is defined as 'the change in its secondary voltage, from no-load to full-load, at a specified power factor, expressed as a percentage of its full-load voltage, with the primary supply voltage held constant'.
What is the use of voltage divider circuit?
Biasing-Application of suitable DC voltages to operate our amplifiers in desired region of operation(say active or saturation or cut-off region) complying our needs.However in order to maintain a constant Q point irrespective of various external factors,hence it again comes to the need for biasing that compensates the change in external factors suitably thereby maintaining a constant Q-point. Voltage divider bias or self bias is a process of suitably biasing amplifier by connecting two resistors in series in the answer. By proper selection of resistors R1 and R2, the operating point of the transistor can be made independent of β.
How will the current change if the voltage in a circuit is reduce while the resistance remains constant?
The current will drop. Y??See it this way - resistance is something that opposes current flow. Voltage is the one that helps the current to get across the resistance. So if u have a high resistance, u need a high voltage to get the same current across.But all the values are solely dependent on the output required.Hope that helps.
Why is voltage regulation important in alternator?
because the voltage should be constant as the full transmission grid need ame voltage for synchronization of alternatos of grid
Why voltage regulation is necessasory?
Voltage may fluctuate due to improper wiring/groundings or sometimes due to sudden load changes. So as to give constant output voltage we need voltage regulation. If we let the voltage to fluctuate then it might cause damage to the equipments
Why variable voltage and variable frequency control is used instead of variable voltage?
variable voltage control has some limitations as you decrease the voltage corresponding phase current will increase lead to increase of flux which lead to saturation of motor core and heating of motor to make flux constant and vary speed of motor v/f ratio need to be maintained constant
Explain how Zener Diode is used as a voltage regulator?
A zener is a diode that has the property when reversed bias to breakdown at a specific voltage this voltage will remain constant as current increase. It is important to be aware that the diode will need to dissipate heat while it is operating. The power is the current flowing through the diode multiplied by the voltage across the diode. For zener diodes with a high reverse breakdown voltage, it can be seen that a lot of power may need to be dissipated for a relatively low current. We can use the constant voltage as a reference voltage. Either a component can be powered directly from the reference voltage created or additional components can be used to increase the available current.
Can you lower 277v to 240v?
Yes, you can lower the voltage from 277V to 240V using a transformer. A transformer can step down the voltage while maintaining the same frequency. Make sure to select the appropriate transformer with the correct voltage rating for the input and output you need.
What is the need for trapezoidal waveform for linearity correction?
This would keep the voltage across the inductance a constant, and corrects the non-linearity problem.
What is the need of resistor in the experiment of pN junction diode?
The resistor limits current so you can measure voltage across the diode. When you forward bias and saturate a junction, the voltage across it will be constant (0.7 in silicon, for example).
What is mean by regulator in electronics circuits?
A regulator holds something (e.g. voltage, current) in a circuit constant (aka regulates it), that otherwise would not stay constant as the circuit operates. Keeping this constant is critical to proper operation of the circuit, thus the need for its regulation.
What is the advantageof a transistor ignition system over the traditional ignition system?
Constant voltage delivery Eliminate the need for periodic replacement of points and condensor
What can happen if a utility-sized electrical generator has an ungrounded neutral?
What you need to define is the statement "utility- sized electrical generator". It depends on what the generators output is used for as to the way it is internally wired. In some configurations there is no neutral to ground as in a Delta configuration.If the generator is configured for a Wye output and the neutral centre tap is not grounded there will be a floating voltage between the generator and the utility system ground. It is for this reason that the generator's neutral point is grounded to bring the floating voltage down to zero volts to ground.
Rolling Utility Cart?
form_title= Rolling Utility Cart form_header=Move supplies easily with a rolling utility cart! On what services, will you be rolling the utility cart?* = _ When do you need the utility cart?* = _
What is the need of voltage regulator?
To regulate the voltage
