Please Log in or Register for more.


130 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



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

Show More

338 views 1 answer








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

Show More

103 views 1 answer








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

Show More

204 views 1 answer







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.

Show More

264 views 2 answers







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.

Show More

125 views 1 answer








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

Show More

85 views 1 answer








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

Show More

63 views 1 answer








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

Show More

120 views 1 answer








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

Show More

829 views 1 answer








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

Show More

189 views 1 answer








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

Show More

161 views 1 answer








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

Show More

73 views 1 answer








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

Show More

257 views 1 answer







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.

Show More

367 views 1 answer








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

Show More

199 views 1 answer







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.

Show More

344 views 1 answer







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.

Show More

278 views 1 answer








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

Show More

244 views 1 answer








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

Show More

89 views 1 answer








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

Show More

128 views 1 answer







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.

Show More

6 views 1 answer







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.

Show More

10 views 1 answer







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.

Show More

5 views 1 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
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

Show More

1.5k views 1 answer







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

Show More

193 views 1 answer







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

Show More

100 views 1 answer







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.

Show More

348 views 1 answer








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

Show More

126 views 1 answer








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

Show More

146 views 1 answer







What do you mean by coil?
Last Answer : Ans. Having one or more turns connected in series is called coil.

Show More

3 views 1 answer







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.

Show More

9 views 0 answers







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.

Show More

213 views 1 answer







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

Show More

169 views 1 answer







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

Show More

700 views 2 answers







Permanent magnet moving coil instruments are used for
Last Answer : PMME are mostly used for measuring voltage and current.

Show More

2.6k views 2 answers







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

Show More

705 views 1 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
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

Show More

737 views 1 answer







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

Show More

101 views 1 answer







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

Show More

174 views 1 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 (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

Show More

358 views 1 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 (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

Show More

190 views 1 answer







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

Show More

136 views 1 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 (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%

Show More

319 views 1 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_______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

Show More

269 views 1 answer







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.

Show More

600 views 1 answer







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.

Show More

300 views 1 answer







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

Show More

68 views 1 answer







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.

Show More

93 views 1 answer








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

Show More

487 views 1 answer








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

Show More

374 views 1 answer






Show More⇦ PreviousNext ⇨