152 views
in Electrical Machine by
The effect of increasing load on a synchronous motor running with normal excitation is

(A) Increase both its Ia and power factor.

(B) Decrease Ia, but increase power factor.

(C) Increase Ia, but decrease power factor

(D) Decrease both Ia and power factor.

Your answer

Thanks for your contribution. Feel free to answer this question. Please avoid short answer. Your answer is most welcome. Be genuine.

Upload image or document:

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
Are you a robot ? (Y = Yes / N = No)
To avoid this verification in future, please log in or register.

1 Answer

0 votes
by

The effect of increasing load on a synchronous motor running with normal excitation is Increase Ia, but decrease power factor


Related questions

1 answer 27 views

In a synchronous generator if the excitation increased from a low value to normal value, with a fixed load  (A) The armature current increases and the power factor decreases  (B) The armature current decreases and the power factor also decreases  (C) The armature current decreases and the power factor increases but is lagging  (D) The armature current decreases and the power factor increases and is leading

asked Apr 29, 2018 in Electrical Machine by Shimroz123
1 answer 18 views

If we change the excitation of synchronous machine will it affect on motor speed?

asked Mar 18, 2018 in Synchronous machine by Shimroz123
1 answer 23 views

While keeping the excitation constant, if the steam supply of an alternator running in parallel with another identical alternator is increased, then (A) It would over-run the other alternator (B) Its rotor will fall back in phase with respect to the other machine (C) Its portion of share in load will increase (D) Its power factor would be decreased.

asked Apr 28, 2018 in Electrical Machine by Shimroz123
1 answer 145 views

what will happen when excitation of an unloaded salient pole synchronous motor suddenly gets disconnected?

asked Mar 18, 2018 in Synchronous machine by Shimroz123
1 answer 434 views

In synchronous motor, does the winding losses vary with load?

asked Mar 3, 2018 in Electrical Machine by Quiz
1 answer 29 views

The synchronous motor which works on leading power factor and does not drive any mechanical load is called?

asked Mar 18, 2018 in Synchronous machine by Shimroz123
1 answer 21 views

In a synchronous motor which losses varies with load?

asked Mar 18, 2018 in Synchronous machine by Shimroz123
1 answer 28 views

If the load of the normally excited synchronous motor is increased the power factor will?

asked Mar 18, 2018 in Synchronous machine by Shimroz123
1 answer 30 views

The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be?

asked Mar 20, 2018 in Induction Machine by Shimroz123
1 answer 28 views

The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as?

asked Mar 20, 2018 in Synchronous machine by Shimroz123
1 answer 31 views

A three-phase synchronous motor connected to ac mains is running at full load and unity power factor. lf its shaft load is reduced by half and field current is held constant then its new power factor will be

asked Apr 28, 2018 in Electrical Machine by Shimroz123
1 answer 24 views

If we change the excitation of synchronous machine will it affect on power factor?

asked Mar 18, 2018 in Synchronous machine by Shimroz123
1 answer 20 views

The synchronous motor will develop maximum power when the load angle is?

asked Mar 18, 2018 in Synchronous machine by Shimroz123
1 answer 36 views

A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is

asked May 3, 2018 in Electrical Machine by Shimroz123
1 answer 24 views

In a synchronous generator delivering lagging power factor load  (1) the excitation emf leads terminal voltage by the power angle (2) the excitation emf lags terminal voltage by the power angle (3) excitation emf leads the terminal voltage by the power factor angle (4) excitation emf lags the terminal voltage by the power factor angle

asked Apr 29, 2018 in Electrical Machine by Shimroz123
1 answer 19 views

The maximum reluctance power of a salient-pole synchronous motor having direct-axis reactance, 1.0 pu and quadrature-axis reactance, 0.5 pu, and input voltage, 1.0 pu is (A) 0.25 pu (B) 0.5 pu (C) 1.0 pu (D) 1.5 pu

asked Apr 28, 2018 in Electrical Machine by Shimroz123
0 answers 17 views

What is the principle of synchronous motor?

asked Mar 15, 2018 in Electrical Machine by Quiz
0 answers 23 views

What is the use of synchronous motor?

asked Mar 15, 2018 in Electrical Machine by Quiz
0 answers 18 views

Why the speed of synchronous motor is constant?

asked Mar 15, 2018 in Electrical Machine by Quiz
1 answer 12 views

When running under no-load condition and with over excitation, armature current Ia drawn by a synchronous motor

asked May 15, 2018 in Electrical Machine by Shimroz123
1 answer 33 views

A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net Voltage across armature resistance at the time of plugging will be

asked May 8, 2018 in Electrical Machine by Shimroz123
2 answers 109 views

what is the difference between synchronous and asynchronous motor?

asked Aug 6, 2017 in Electrical Machine by Zeeshan
1 answer 19 views

The back emf of synchronous motor depends on?

asked Mar 18, 2018 in Synchronous machine by Shimroz123
1 answer 27 views

Damper winding in a synchronous motor

asked May 8, 2018 in Electrical Machine by Shimroz123
0 answers 12 views

Why synchronous motor Cannot start itself?

asked Mar 15, 2018 in Electrical Machine by Quiz
0 answers 22 views

How can we improve power factor using synchronous motor?

asked Mar 15, 2018 in Electrical Machine by Quiz
0 answers 36 views

The maximum torque which a synchronous motor will develop at rest for any angular position of the rotor, at rated stator supply voltage and frequency, is known as?

asked Mar 20, 2018 in Synchronous machine by Shimroz123
2 answers 58 views

The synchronous speed of an 8 pole induction motor supplied power from a 50 Hz source will be ?

asked Dec 31, 2017 in Electrical Engineering by Quiz

Welcome to electronics2electrical.com here you can ask questions related to electrical, electronics, mechanical, telecommunication, instrumentation, computer, mathematics, physics etc.
Be respectful to all the members. Do not copy and paste the answers from other websites which have copyright content. While asking question give full details about it.

Categories

Most popular tags

power motor dc circuit transformer voltage current used system phase resistance factor synchronous load ac energy induction electric generator series frequency between speed capacitor use electrical meter line difference control type mosfet transmission magnetic plant high single instrument bjt unit source advantages function diode and machine winding field define torque parallel amplifier supply shunt thyristor motors electricity arduino maximum time relay armature problem value on transformers types coil diagram state flow ratio material three formula starting direction theorem method emf operating efficiency digital wave microprocessor test instruments inductance loss measure operation connected signal low applications effect single-phase network temperature working constant losses different law wattmeter measuring compare controlled breaker drive device logic rc full switch flux wire resistivity disadvantages free of materials machines angle force converter conductor transistor gain open protection scr core measurement number bridge principle generators reactance circuits negative the friction iron loop short pole battery conservation steam resistors hysteresis computer using analog lines secondary station gate a rectifier inverter linear induced relays nuclear capacitance basic characteristics design direct work rotor electronics ammeter forces diesel damping rlc connection factors capacitors minimum insulation moving regulation running self systems air fault range main stability quality starter igbt eddy alternator ideal rl average 3-phase plants arc thermal error fuzzy biasing dielectric pressure balanced superposition errors copper rotation feedback impedance measured electronic electrons charge inductive transfer explain start off back curve over solar is three-phase tariff locomotive peak bias zener engineering commutator surge conductors rating universal potentiometer density permanent mechanical transducer capacity memory adc excitation two fuse pure harmonics application semiconductor inductor internal pmmc reaction welding resonance traction permeability breakers rms designed electromagnetic si generation brushes switching capacitive shaded rate 1 distribution resistor methods delta star oscillator reluctance simplification algebra 8085 boolean weston dynamometer insulating strength installation definition fuel heating earth units

8,471 questions

7,069 answers

134 comments

3,088 users

...