133 views

1 Answer

Answer :

In a shaded pole motor, the shading coil usually consist of a single turn of heavy copper wire which is short-circuited and carries only induced current.

Like 0 like

Please log in or register to answer this question.

Related questions

356 views

Last Answer : In case of a shaded pole motor the direction of rotation of the motor is from main pole to shaded pole.

1 answer
111 views

Last Answer : A shaded pole motor can be used for toys, hair dryers, circulators etc.

1 answer
222 views

Last Answer : In a shaded pole single-phase motor, the revolving field is produced by the use of shading coils.

1 answer
282 views

Description : With a neat sketch give the working of shaded pole induction motor.

Last Answer : Explanation: It has squirrel cage rotor and salient pole stator. The stator poles are shaded partially by short circuited conductor band to create the phase difference between the fluxes emerging from shaded ... rotating magnetic field in the air-gap and torque is exerted on the squirrel cage rotor.

2 answers
132 views

Description : State two applications of 1) Shaded pole motor 2) Universal motor

Last Answer : (i)Applications of Shaded pole motor: 1. Small fans 2. Toy motors 3. Hair dryers 4. Ventilators 5. Electric clocks 6. Record players 7. Motorized valves 8. Gramophones 9. Photocopying ... 5. Portable Drilling Machines 6. Electric Shavers 7. Mechanical computing Machines 8. Machine Tools etc.

1 answer
88 views

Last Answer : Locked rotor current of a shaded pole motor is slightly more than full load current.

1 answer
67 views

Last Answer : The shaded pole motor is used for low starting torque.

1 answer
121 views

Last Answer : The range of efficiency for shaded pole motors is 5% to 35%.

1 answer
843 views

Last Answer : The torque produced in induction type relay (shaded pole structure) is inversely proportional to the square of the current.

1 answer
222 views

Last Answer : The power factor of a single-phase induction motor is usually lagging.

1 answer
165 views

Last Answer : In a A.C. series motor armature coils are usually connected to commutator through resistance.

1 answer
77 views

Last Answer : The efficiency of a properly designed synchronous motor will usually fall in range 85 to 95%.

1 answer
264 views

Last Answer : If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will stop.

1 answer
377 views

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

Last Answer : When excitation of an unloaded salient pole synchronous motor suddenly gets disconnected the motor will stop.

1 answer
210 views

Last Answer : The adjustment of position of shading bands, in an energy meter is done to provide friction compensation.

1 answer
396 views

Description : State the function of overload coil and No volt coil in dc motor starter.

Last Answer : Function of Overload Coil: When DC motor is overloaded, the overload coil carries the overload current and produces strong magnetic field to attract a plunger, which short the terminals of ... dc motor is prevented from restarting automatically on recovery of supply without starter and protected.

1 answer
297 views

Description : Power factor of an inductive circuit is usually improved by connecting capacitor to it in?

Last Answer : Power factor of an inductive circuit is usually improved by connecting capacitor to it in parallel.

1 answer
248 views

Last Answer : The braking retardation is usually in the range 10 to 15 km phps.

1 answer
92 views

Last Answer : The voltage used for suburban trains in D.C. system is usually 600 to 750 V.

1 answer
128 views

Last Answer : Overload capacity of diesel engines is usually restricted to 2 percent.

1 answer
9 views

Description : Pole Climbing & Attention to Street Light, Jumpers & Insulator Checking & Replacement of Insulator?

Last Answer : Ans. (a) Before pole climbing, supply to be disconnected (b) While climbing safety belt, helmet to be used. (c) While attending street light, safety board to be displayed. (d) While providing jumpers ... non-essential (g) Essential loads to be brought to single point. (h) Then connect UPS supply.

1 answer
11 views

Description : How to Rig a Fishing Pole

Last Answer : How to Rig a Fishing Pole Fishing can be a really exciting outdoor experience, not just a nap in the middle of a lake while holding a complicated stick. Rigging a fishing pole ... these steps, you can prepare your fishing equipment properly for a weekend afternoon of recreation and relaxation.

1 answer
7 views

Description : How to Build a Pole Barn ?

Last Answer : How to Build a Pole Barn How to Build a Pole Barn One of the simplest installations that you can make in your property is a pole barn. Usually found on agricultural land, a pole barn ... . Pond construction is also helpful if you want to add some extra features for your small household farm.

1 answer
1.6k views

Description : A 50 Hz, 4 pole turboalternator rated at 20 MVA. 13.2 KV has an inertia constant H = 4 KW sec/KVA. The K.E. stored in the rotor at synchronous speed is

Last Answer : A 50 Hz, 4 pole turboalternator rated at 20 MVA. 13.2 KV has an inertia constant H = 4 KW sec/KVA. The K.E. stored in the rotor at synchronous speed is 80 MJ

1 answer
203 views

Description : The armature current on symmetrical 3 phase short circuit of a synchronous machine (salient pole)  (A) has q -axis current only (B) has d -axis current only (C) has both d and q axis currents (D) cannot be divided between q and d axis currents

Last Answer : The armature current on symmetrical 3 phase short circuit of a synchronous machine (salient pole) has d -axis current only

1 answer
102 views

Description : Salient pole rotor is use for which speed?

Last Answer : Salient pole rotor is use for low and medium speed prime movers.

1 answer
354 views

Description : Explain MOSFET gate drive circuit and totem pole configuration.

Last 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.

1 answer
131 views

Last Answer : Single phase induction motor usually operates on 0.6 power factor lagging.

1 answer
149 views

Last Answer : The motor used on small lathes is usually single-phase capacitor run motor.

1 answer
4 views

Description : What do you mean by coil?

Last Answer : Ans. Having one or more turns connected in series is called coil.

1 answer
13 views

Description : A permanent-magnet moving-coil instrument gives full-scale deflection with 5 mA and has a resistance of 5 Ω. Calculate the resistance of the necessary components in order that the instrument may be used as (i) a 2 A ammeter & (ii) a 100 V voltmeter.

0 answers
219 views

Description : Name the material used for :- (i) Moving coil (ii) Permanent magnet in PMMC instrument.

Last Answer : (i) Material used for Moving coil: Copper, Aluminum( some times)  (ii) Permanent magnets are made of special alloys such as :  Aluminum-Nickel-Cobalt (Alnicos)  Strontium-Iron  Neodymium-Iron-Boron  Samarium-Cobalt.

1 answer
174 views

Description : State the material used for moving coil and former for PMMC instruments. 

Last Answer : Material Used for Moving Coil and Former for PMMC Instruments:  Material used for moving coil: Copper  Material used for Former: Aluminium

1 answer
719 views

Description : The purpose of the restraining coil in a biased differential relay is  (A) To reduce CT saturation during fault.  (B) To increase the sensitivity of the relay.  (C) To match the transformation ratio.  (D) To limit the spill current through the relay during heavy external fault.

Last Answer : d

2 answers
2.6k views

Description : Permanent magnet moving coil instruments are used for

Last Answer : PMME are mostly used for measuring voltage and current.

2 answers
706 views

Description : Peterson coil is used for :  (A) shunt compensation of lines (B) grounding of system neutral (B) reduce fault currents (D) connecting interconnected systems

Last Answer : Peterson coil is used for : grounding of system neutral

1 answer
755 views

Description : A moving coil of meter has 100 turns, and a length and depth of 10mm and 20mm respectively. It is positioned in a uniform radial flux density of 200 mT. The coil carrier current capacity is 50 mA. The torque on the coil is

Last Answer : A moving coil of meter has 100 turns, and a length and depth of 10mm and 20mm respectively. It is positioned in a uniform radial flux density of 200 mT. The coil carrier current capacity is 50 mA. The torque on the coil is 200µNm

1 answer
102 views

Description : A Peterson coil is ________ A) An arc generating coil B) An arc suppressing coil C) An arc inducing coil D) None of these

Last Answer : A Peterson coil is An arc suppressing coil

1 answer
191 views

Description : The self inductance of a coil can be measured using (A) Wien’s Bridge (B) Schering Bridge (C) Anderson’s Bridge (D) Wheatstone Bridge

Last Answer : The self inductance of a coil can be measured using Anderson’s Bridge

1 answer
376 views

Description : A PMMC instrument has FSD of 100 μA and a coil resistance of 1 kΩ. To convert the instrument into an ammeter with full scale deflection of 100 mA, the required shunt resistance is (A) 1 Ω (B) 1.001 Ω (C) 0.5 Ω (D) 10 Ω

Last Answer : A PMMC instrument has FSD of 100 μA and a coil resistance of 1 kΩ. To convert the instrument into an ammeter with full scale deflection of 100 mA, the required shunt resistance is 1.001 Ω

1 answer
201 views

Description : A moving coil meter has a resistance of 3 Ω and gives full scale deflection with 30 mA. To measure voltage up to 300 V, the external resistance to be connected in series with the instrument is (A) 9997 Ω (B) 10000 Ω (C) 997 Ω (D) 10003 Ω

Last Answer : A moving coil meter has a resistance of 3 Ω and gives full scale deflection with 30 mA. To measure voltage up to 300 V, the external resistance to be connected in series with the instrument is 9997 Ω

1 answer
136 views

Description : lt the length, number of turns and area of a coil are  doubled, the inductance of the coil

Last Answer : lt the length, number of turns and area of a coil are  doubled, the inductance of the coil is quadrupled

1 answer
325 views

Description : The potential coil of a single phase dynamometer wattmeter has 4840 Ohm resistance. Voltage across the load is 220 V. With the potential coil connected on the load side, the meter indicates 100 W. Approximate percentage error due to wattmeter connection is (A) 11% (B) 9% (C) 1.1% (D) 3%

Last Answer : The potential coil of a single phase dynamometer wattmeter has 4840 Ohm resistance. Voltage across the load is 220 V. With the potential coil connected on the load side, the meter indicates 100 W. Approximate percentage error due to wattmeter connection is 11%

1 answer
281 views

Description : The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is_______Vs.

Last Answer : The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is 20 Vs

1 answer
614 views

Description : The rate of rise of current through an inductive coil is maximum?

Last Answer : The rate of rise of current through an inductive coil is maximum at the start of the current flow.

1 answer
320 views

Description : The inductance of a coil can be increased by?

Last Answer : The inductance of a coil can be increased by choosing core material having high relative permeability.

1 answer
72 views

Description : Inductance of coil?

Last Answer : Inductance of coil increases with the increase in supply frequency.

1 answer
97 views

Description : Inductance of a coil Varies?

Last Answer : Inductance of a coil Varies as directly as the cross-sectional area of magnetic core and inversely as the length of the iron path.

1 answer
493 views

Last Answer : In a low power factor wattmeter the compensating coil is connected in series with pressure coil.

1 answer
390 views

Last Answer : In a low power factor wattmeter the pressure coil is connected to the load side of the current coil.

1 answer
...