The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is?

Question

Please Log in or Register for more.

The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is?

324 views

asked Mar 20, 2018 by anonymous

1 Answer

Please log in or register to answer this question.

Related Questions

In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be?

Last Answer : In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be more than full-load current.

366 views 1 answer

asked Mar 20, 2018 by anonymous

In case of D.C. shunt motors the speed is dependent on back e.m.f. only because?

Last Answer : In case of D.C. shunt motors the speed is dependent on back e.m.f. only because flux is practically constant in D:C. shunt motors.

250 views 1 answer

asked Mar 20, 2018 by anonymous

What will happen if the back e.m.f. of a D.C. motor vanishes suddenly?

Last Answer : The armature may burn if the back e.m.f. of a D.C. motor vanishes suddenly.

423 views 1 answer

asked Mar 20, 2018 by anonymous

The mechanical power developed by the armature of a d.c. motor is equal to?

The mechanical power developed by the armature of a d.c. motor is equal to?
Last Answer : The mechanical power developed by the armature of a d.c. motor is equal to armature current multiplied by back e.m.f.

982 views 1 answer

asked Mar 26, 2018 by anonymous

The back emf of synchronous motor depends on?

The back emf of synchronous motor depends on?
Last Answer : The back emf of synchronous motor depends on load angle.

65 views 1 answer

asked Mar 18, 2018 by anonymous

What is back EMF of synchronous motor?

77 views 0 answers

asked Mar 15, 2018 by anonymous

What is the back EMF of a dc motor?

2.6k views 0 answers

asked Mar 15, 2018 by anonymous

What is the back EMF of the motor?

68 views 0 answers

asked Mar 15, 2018 by anonymous

The maximum reluctance power of a salient-pole synchronous motor having direct-axis reactance, 1.0 pu and

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
Last Answer : 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 0.5 pu

98 views 1 answer

asked Apr 28, 2018 by anonymous

The condition for maximum power in case of D.C. motor is?

Last Answer : (b) Clostridium butylicum Lipase Removal of oil stains

107 views 1 answer

asked Mar 20, 2018 by anonymous

In a d.c. motor, the mechanical output power actually comes from?

In a d.c. motor, the mechanical output power actually comes from?
Last Answer : In a d.c. motor, the mechanical output power actually comes from electrical input power.

1.2k views 1 answer

asked Mar 26, 2018 by anonymous

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

The synchronous motor which works on leading power factor and does not drive any mechanical load is called?
Last Answer : The synchronous motor which works on leading power factor and does not drive any mechanical load is called synchronous condenser.

162 views 1 answer

asked Mar 18, 2018 by anonymous

The maximum constant load torque under which a synchronous motor will pull into synchronism...

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

302 views 1 answer

asked Mar 20, 2018 by anonymous

The maximum torque which a synchronous motor will develop at rest for any angular position of the rotor...

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?

106 views 0 answers

asked Mar 20, 2018 by anonymous

An independent voltage source in series with an impedance ZS=R+jXS delivers a maximum average power to

An independent voltage source in series with an impedance ZS=R+jXS delivers a maximum average power to a load impedance ZL when A) ZL = R B) ZL = jXS C) ZL = R-jXS D) ZL = R+jXS
Last Answer : An independent voltage source in series with an impedance ZS=R+jXS delivers a maximum average power to a load impedance ZL when ZL = R-jXS

4.0k views 1 answer

asked Jun 18, 2018 by anonymous

If the speed of a D.C. shunt motor is increased, the back e.m.f. of the motor will?

Last Answer : If the speed of a D.C. shunt motor is increased, the back e.m.f. of the motor will increase.

201 views 1 answer

asked Mar 20, 2018 by anonymous

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

The synchronous motor will develop maximum power when the load angle is?
Last Answer : The synchronous motor will develop maximum power when the load angle is 900.

223 views 1 answer

asked Mar 18, 2018 by anonymous

In repulsion motor, maximum torque is developed when?

Last Answer : In repulsion motor, maximum torque is developed when brush axis is at 45° electrical to the field axis.

115 views 1 answer

asked Mar 20, 2018 by anonymous

A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s.

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
Last Answer : 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 474 V

481 views 1 answer

asked May 8, 2018 by anonymous

A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance

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
Last Answer : 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 36 Ohm

329 views 1 answer

asked May 3, 2018 by anonymous

For a D.C. shunt motor if the excitation is changed?

Last Answer : For a D.C. shunt motor if the excitation is changed torque will change but power will remain constant.

168 views 1 answer

asked Mar 20, 2018 by anonymous

The speed of a D.C. shunt motor can be increased by?

Last Answer : The speed of a D.C. shunt motor can be increased by increasing the resistance in field circuit.

134 views 1 answer

asked Mar 20, 2018 by anonymous

The armature torque of the D.C. shunt motor is proportional to?

Last Answer : The armature torque of the D.C. shunt motor is proportional to armature current.

210 views 1 answer

asked Mar 20, 2018 by anonymous

As the load is increased the speed of D.C. shunt motor will?

Last Answer : As the load is increased the speed of D.C. shunt motor will reduce slightly.

142 views 1 answer

asked Mar 20, 2018 by anonymous

In a D.C. shunt motor, speed is?

Last Answer : In a D.C. shunt motor, speed is independent of armature current.

87 views 1 answer

asked Mar 20, 2018 by anonymous

The speed of a D.C. shunt motor more than its full-load speed can be obtained by?

Last Answer : The speed of a D.C. shunt motor more than its full-load speed can be obtained by decreasing the field current.

146 views 1 answer

asked Mar 20, 2018 by anonymous

If the field of a D.C. shunt motor gets opened while motor is running?

Last Answer : If the field of a D.C. shunt motor gets opened while motor is running the motor will attain dangerously high speed.

135 views 1 answer

asked Mar 20, 2018 by anonymous

The counter e.m.f. of a d.c. motor?

The counter e.m.f. of a d.c. motor?
Last Answer : The counter e.m.f. of a d.c. motor helps in energy conversion.

90 views 1 answer

asked Mar 26, 2018 by anonymous

When the armature of a D.C. motor rotates, e.m.f. induced is

Last Answer : When the armature of a D.C. motor rotates, e.m.f. induced is back e.m.f.

203 views 1 answer

asked Mar 20, 2018 by anonymous

What is back emf?

What is back emf?
Last Answer : Back EMF: When a current carrying conductor is placed in a magnetic field it experiences a force; when it moves due to the force it (conductor) cuts the magnetic field due to which an emf is ... (hence the applied armature voltage) is opposed by the induced emf which is therefore called as Back emf.

91 views 1 answer

asked Apr 27, 2020 by anonymous

Do AC induction motors have back EMF?

71 views 0 answers

asked Mar 15, 2018 by anonymous

What is back EMF in inductor?

138 views 0 answers

asked Mar 15, 2018 by anonymous

What is the back EMF in Transformers?

77 views 0 answers

asked Mar 15, 2018 by anonymous

What is the back EMF?

What is the back EMF?
Last Answer : When the armature of a d.c. motor rotates under the influence of the driving torque, the armature conductors move through the magnetic field and hence e.m.f. is induced in them as in a generator. The ... that energy conversion in a d.c. motor is only possible due to the production of back emf.

107 views 1 answer

asked Mar 15, 2018 by anonymous

DC shunt motor

DC shunt motor
Last 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%; }

140 views 2 answers

asked Apr 23, 2020 by anonymous

If field current is decreased in shunt dc motor, the speed of the motor

If field current is decreased in shunt dc motor, the speed of the motor (a) remains same. (b) increases. (c) decreases. (d) none of the above.
Last Answer : increases

2.8k views 4 answers

asked Aug 25, 2019 by anonymous

State any four applications of DC shunt motor.

State any four applications of DC shunt motor.
Last Answer : Applications of DC shunt motor: 1) Lathe machines 2) drilling machines 3) milling machines 4) Printing machinery 5) Paper industry 6) centrifugal and reciprocating pumps 7) blowers 8)fans

115 views 2 answers

asked Jul 27, 2019 by anonymous

Why does the speed of a DC shunt motor decrease as the load increases?

Why does the speed of a DC shunt motor decrease as the load increases?
Last Answer : Because if the load is increasing then the torque must also be increase. If not then the speed of motor will decrease.

2.7k views 1 answer

asked Jul 5, 2019 by anonymous

If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens?

Last Answer : If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens this will make armature to take heavy current, possibly burning it.

158 views 1 answer

asked Mar 20, 2018 by anonymous

In a manual shunt motor starter?

Last Answer : In a manual shunt motor starter over load relay is connected in series and no volt relay in parallel with the load.

76 views 1 answer

asked Mar 20, 2018 by anonymous

Voltage ratio

Voltage ratio
Last Answer : Voltage ratio

111 views 1 answer

asked Jun 11, 2019 by anonymous

Define: 1) voltage ratio, 2) current ratio, 3) transformation ratio of transformer.

Define: 1) voltage ratio, 2) current ratio, 3) transformation ratio of transformer.
Last Answer : 1) Voltage ratio: The voltages in primary and secondary winding is proportional to number of turns in primary and secondary respectively. So, the voltage ratio is same as transformation ratio. V2/V1 = N2 ... as transformation ratio of transformer. It is denoted by K. K = N2/N1

2.7k views 1 answer

asked Aug 12, 2018 by anonymous

A dc chopper is fed from a constant voltage mains the duty ratio of chopper is progressively increased while

A dc chopper is fed from a constant voltage mains the duty ratio of chopper is progressively increased while the chopper feeds an RL load. The per unit current ripple would (1) increase progressively (2 ... 0.5 and then increase (4) increase to a maximum value at α = 0.5 and then decrease
Last Answer : A dc chopper is fed from a constant voltage mains the duty ratio of chopper is progressively increased while the chopper feeds an RL load. The per unit current ripple would increase to a maximum value at α = 0.5 and then decrease

523 views 1 answer

asked Apr 30, 2018 by anonymous

The voltage transformation ratio of a transformer is equal to the ratio of?

The voltage transformation ratio of a transformer is equal to the ratio of?
Last Answer : The voltage transformation ratio of a transformer is equal to the ratio of secondary induced e.m.f. to primary induced e.m.f.

166 views 1 answer

asked Mar 19, 2018 by anonymous

Ratio of the rotor reactance X to the rotor resistance R for a two-phase servo motor

Ratio of the rotor reactance X to the rotor resistance R for a two-phase servo motor (A) is equal to that of a normal induction motor (B) is less than that of a normal induction motor (C) ... than that of a normal induction motor (D) may be less or greater than that of a normal induction motor
Last Answer : C

581 views 2 answers

asked Apr 28, 2018 by anonymous

The Eb/V ratio of a d.c. motor is an indication of its?

The Eb/V ratio of a d.c. motor is an indication of its?
Last Answer : The Eb/V ratio of a d.c. motor is an indication of its efficiency.

743 views 1 answer

asked Mar 26, 2018 by anonymous

Which D.C. motor has got maximum self relieving property ?

Last Answer : Series motor has got maximum self relieving property.

193 views 1 answer

asked Mar 20, 2018 by anonymous

What is the maximum value of torque angle in synchronous motor?

What is the maximum value of torque angle in synchronous motor?
Last Answer : The maximum value of torque angle in synchronous motor is 90 degrees electrical.

1.5k views 1 answer

asked Mar 18, 2018 by anonymous

A change of 4% in the supply voltage to an induction motor will produce a change of approximately

A change of 4% in the supply voltage to an induction motor will produce a change of approximately
Last Answer : A change of 4% in the supply voltage to an induction motor will produce a change of approximately 8% in the rotor torque

467 views 1 answer

asked May 8, 2018 by anonymous

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque (1) Decreases (2) Increases (3) Remains constant (4) None of the above
Last Answer : The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque Increases

227 views 1 answer

asked May 1, 2018 by anonymous

anonymous · Answer 1 · 2018-03-20T20:31:20+0000

The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is 0.5.

The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is?

Please log in or register to add a comment.

1 Answer

Answer :

Please log in or register to add a comment.

Please log in or register to answer this question.

Related Questions