Last Answer : Direction of rotation of a split phase motor can be reversed by reversing the connection of either running winding or starting winding.
Show More
357 views
1 answer
asked
Mar 20, 2018
by
anonymous

The direction of rotation of an inverter fed 3-phase ac motor is reversed by (A) a mechanical reversing switch (B) reversing the input dc link voltage (C) operating the inverter as a rectifier (D) changing the sequence of switching
Last Answer : The direction of rotation of an inverter fed 3-phase ac motor is reversed by changing the sequence of switching
Show More
153 views
1 answer
asked
Apr 28, 2018
by
anonymous

Last Answer : The direction of rotation of a D.C. series motor can be changed by interchanging field terminals.
Show More
184 views
1 answer
asked
Mar 20, 2018
by
anonymous

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
asked
Mar 20, 2018
by
anonymous

Last Answer : The direction of rotation of an hysteresis motor is determined by position of shaded pole with respect to main pole.
Show More
230 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : In repulsion motor direction of rotation of motor is the same as that of brush shift.
Show More
116 views
1 answer
asked
Mar 20, 2018
by
anonymous
.jpg)
How can we reverse the direction of rotation of synchronous motor?
Last Answer : By reversing supply phase sequence we can reverse the direction of rotation of synchronous motor.
Show More
305 views
1 answer
asked
Mar 18, 2018
by
anonymous

In a synchronous machine, if the field flux axis ahead of the armature field axis in the direction of rotation, the machine is operating as (1) synchronous motor (2) synchronous generator (3) asynchronous motor (4) asynchronous generator
Last Answer : In a synchronous machine, if the field flux axis ahead of the armature field axis in the direction of rotation, the machine is operating as synchronous generator
Show More
599 views
1 answer
asked
May 1, 2018
by
anonymous

Last Answer : To reverse the direction of rotation of a capacitor start motor while it is running we should disconnect motor from the supply till it stops then reconnect it to supply with reversed connection of main or auxiliary winding.
Show More
130 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : The speed of a universal motor is usually reduced by using gearing.
Show More
114 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : Speed control of a universal motor is achieved by varying field flux with tapped field windings, connecting rheostat in series, applying variable voltage by means of silicon controlled rectifier, applying variable voltage by means of variable auto-transformer.
Show More
100 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : A universal motor is one which can be operated either on D.C. or A.C. supply at approximately the same speed and output.
Show More
71 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : In a universal motor, the most common cause of brush sparking is open armature winding, shorted armature winding, shorted field winding, high commutator mica.
Show More
147 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : The speed/load characteristics of a universal motor is same as that of D.C. series motor.
Show More
175 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : The speed control of universal motor used for sewing machines is by varying the resistance.
Show More
105 views
1 answer
asked
Mar 20, 2018
by
anonymous

how can we reverse the direction of rotation of three phase induction motor ?
Last Answer : The direction of rotation of three phase induction motor can be reversed by plugging i.e by changing any two out of three phases of the supply to the stator of the Induction motor terminal.
Show More
137 views
1 answer
asked
Oct 4, 2017
by
anonymous

State working principle of universal motor with the help of diagram.
Last Answer : Working Principle of Universal motor : It is modified DC series motor which can work on AC as well as DC supply. According to basic motor principle, whenever a current carrying conductor is placed in magnetic ... They have nearly same operating characteristic for both AC and DC supply.
Show More
144 views
1 answer
asked
Aug 17, 2019
by
anonymous

applications of each: i) Universal motor ii) Stepper motor.
Last Answer : i) Applications of Universal motor: 1) portable drills 2) hair dryers 3) grinders 4) mixers 5) table-fans 6) blowers 7) polishers 8) Kitchen appliances ii) Applications of Stepper motor ... 7) robotics 8) CNC machine 9) Control systems 10) Biomedical applications 10) XY recorder 11) plotters
Show More
134 views
1 answer
asked
Aug 17, 2019
by
anonymous

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
asked
Jul 26, 2019
by
anonymous

Draw and explain working of universal motor. Give two applications of universal motor.
Last Answer : Figure of Universal motor: Operation of universal motor on A.C. and D.C. supply: *A universal motor works on either DC or single phase AC supply. When the universal motor is ... , regardless of AC or DC supply, universal motor works on the same principle that DC series motor works.
Show More
360 views
4 answers
asked
Jul 20, 2019
by
anonymous

Last Answer : The speed of a universal motor is generally reduced by using gear trains.
Show More
96 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : A universal motor can run on either A.C. or D.C.
Show More
70 views
1 answer
asked
Mar 20, 2018
by
anonymous

In a single-phase induction motor, the operating direction is determined by the ________ A) Rotor B) Stator C) Starting circuit D) None of these
Last Answer : In a single-phase induction motor, the operating direction is determined by the Starting circuit
Show More
127 views
1 answer
asked
Apr 29, 2018
by
anonymous

The direction of rotation of a DC propulsion motor can be reversed by __________. A. reversing the field connections B. reversing the field and the armature connections C. wiring the field and armature in parallel D. wiring the field and armature in series
Last Answer : Answer: A
Show More
3 views
1 answer

The direction of rotation of hysteresis motor is reversed by (A) Shift shaded pole with respect to main pole (B) Reversing supply lead (C) Either A or B (D) Neither A nor B
Last Answer : Ans: A This motor used single phase, 50Hz supply and stator has two windings. These are connected continuously from starting to running.
Show More
23 views
1 answer

What is the direction of flow of current?
Last Answer : Current flows from anode to cathode(opposite direction to flow of electrons)
Show More
95 views
1 answer
asked
Mar 14, 2018
by
anonymous

What is the direction of the conventional current flow?
Last Answer : The conventional current flow in opposite direction of flow of electrons. The electrons flow from negative terminal of battery to positive terminal of battery. And conventional current flow from positive terminal of battery to negative terminal of battery.
Show More
101 views
1 answer
asked
Mar 14, 2018
by
anonymous

What is the direction of flow of electric current in an electric circuit?
Last Answer : It flows from anode to cathode (direction of holes flow)
Show More
171 views
1 answer
asked
Mar 14, 2018
by
anonymous

Why: moons orbit rate = moons rotation rate?
Last Answer : answer:Google: lunar synchronous rotation Google: lunar libration Simple or complicated explanations available. We see glimpses of more than 50% of the lunar surface, due to its elliptical orbit and its slight tilt to the earth’s orbit around sun (ecliptic.)
Show More
1 view
1 answer
asked
Feb 14
by
anonymous

What human gestures are universal?
Last Answer : The bird. That speaks in every language. Thumbs up also seems pretty universal.
Show More
2 views
1 answer
asked
Feb 28
by
anonymous
.jpg)
What is a Universal Blood Donor and a Universal Blood Recipient?
Last Answer : A universal blood donor is a person who is eligible to donate blood to any person in the world, except for a few set of people. The universal blood donor must have O- (O negative) blood group in ... type, even O-. So, the donor as well as recipient must be careful while involving in this process.
Show More
3 views
1 answer

A universal RLC bridge uses?
Last Answer : A universal RLC bridge uses Maxwell Wein bridge for measurement of inductance and modified De Santy's bridge for measurement of capacitance.
Show More
312 views
1 answer
asked
Mar 21, 2018
by
anonymous

What is the direction of flow when charging a capacitor?
Show More
74 views
0 answers
asked
Mar 15, 2018
by
anonymous
.jpg)
What is the direction of the flow of electrons?
Last Answer : Electrons flow cathode to anode or in an oposite direction of convection current flow or holes.
Show More
110 views
1 answer
asked
Mar 14, 2018
by
anonymous

Which statement is true concerning a split-phase induction motor? A. Motor rotation can be reversed without changing the windings or leads. B. Motor speed can be readily adjusted from zero to full ... proper wiring. D. Motor rotation can be reversed by reversing the leads on the starting winding.
Last Answer : Answer: D
Show More
2 views
1 answer

How does AC current change direction?
Last Answer : This is because the angle at which the magnetic fields cuts across a winding changes its poles thus current has to change dirention .
Show More
92 views
1 answer
asked
Mar 14, 2018
by
anonymous

What happens when you reverse the direction of the current in an electromagnet?
Last Answer : When you reverse current direction in an electromagnet, the magnetic poles will also change.
Show More
172 views
1 answer
asked
Mar 14, 2018
by
anonymous

What is the direction of an AC current?
Last Answer : The magnitude and direction of alternating current is changes with respect to time. So for half cycle it is positive and for next half cycle it is negative.
Show More
2.6k views
2 answers
asked
Mar 14, 2018
by
anonymous

What is the direction of the induced current?
Show More
81 views
0 answers
asked
Mar 14, 2018
by
anonymous

why current flows in opposite direction of electrons?
Last Answer : Hi team, the current flow is nothing but flow of electrons But the conventional direction I'd opposite to actual current flow . ..
Show More
116 views
1 answer
asked
Oct 3, 2017
by
anonymous

Two non-collinear parallel equal forces acting in opposite direction?
Last Answer : Two non-collinear parallel equal forces acting in opposite direction constitute a couple.
Show More
455 views
1 answer
asked
Mar 22, 2018
by
anonymous

What is the direction of the induced electric field?
Last Answer : It is in opposite direction to the one that produced it.
Show More
78 views
1 answer
asked
Mar 14, 2018
by
anonymous

What is the direction of the electric field?
Last Answer : Electric field is at right angle widh flow of current (right hand rule).
Show More
127 views
1 answer
asked
Mar 14, 2018
by
anonymous

Last Answer : Yes DIAC can conduct in both direction.
Show More
69 views
1 answer
asked
Sep 20, 2017
by
anonymous

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
Show More
329 views
1 answer
asked
May 3, 2018
by
anonymous

Last Answer : The current drawn by the armature of D.C. motor is directly proportional to the torque required.
Show More
582 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to 25% of the previous value.
Show More
503 views
1 answer
asked
Mar 20, 2018
by
anonymous

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.
Show More
366 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : Locked rotor current of a shaded pole motor is slightly more than full load current.
Show More
85 views
1 answer
asked
Mar 20, 2018
by
anonymous

What will happen if you increase the current in the motor?
Last Answer : Increasing current means increasing frequency of the motor because current is directly proportional to rotations of the motor rotor
Show More
174 views
1 answer
asked
Mar 15, 2018
by
anonymous
