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

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

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

Briefly describe the electric field of a static charge.
Show More
82 views
0 answers
asked
Jun 29, 2019
by
anonymous

The ability of materials to become polarized under an applied electric field is called _______ A) Ferroelectricity B) Paraelectricity C) Polectricity D) None of these
Last Answer : The ability of materials to become polarized under an applied electric field is called Paraelectricity
Show More
148 views
1 answer
asked
Apr 29, 2018
by
anonymous

The electric field inside a hollow conducting sphere ________ A) Depends on the diameter of the sphere B) Varies according to the direction of earth’s magnetic poles C) Is zero D) None of these
Last Answer : The electric field inside a hollow conducting sphere Is zero
Show More
135 views
1 answer
asked
Apr 29, 2018
by
anonymous
.jpg)
Is electric potential zero when electric field is zero?
Last Answer : Yes .If electric field is zero then electric potential is zero , not even one.
Show More
95 views
1 answer
asked
Mar 14, 2018
by
anonymous
.jpg)
Can the electric field between two positive charges be zero?
Last Answer : It can only if they have equal charges.
Show More
80 views
1 answer
asked
Mar 14, 2018
by
anonymous

MOSFET uses the electric field of?
Last Answer : MOSFET uses the electric field of gate capacitance.
Show More
101 views
1 answer
asked
Mar 19, 2018
by
anonymous

An electric motor in which both stator field and rotor rotates with same speed is called?
Last Answer : An electric motor in which both stator field and rotor rotates with same speed is called synchronous motor.
Show More
177 views
1 answer
asked
Mar 18, 2018
by
anonymous

How can a magnetic field be used to generate an electric current?
Last Answer : Magnetic field can be used to generate electric current on a condition that it is on a rate of changing magnetic flux. (Faraday's law)
Show More
106 views
1 answer
asked
Mar 10, 2018
by
anonymous
.jpg)
Self induced emf and Mutually induced emf
Last Answer : (i) Self-induced e.m.f.: The e.m.f. induced in a coil due to the change of its own flux linked with it, is called self-induced e.m.f. (ii) Mutually induced e.m.f.: The e.m.f. induced in a coil due to the changing current in the neighbouring coil, is called mutually induced e.m.f.
Show More
140 views
1 answer
asked
Aug 17, 2019
by
anonymous

Self induced voltage across an inductance
Last Answer : Self induced voltage across an inductance
Show More
134 views
1 answer
asked
Jun 11, 2019
by
anonymous

Faraday's law of induced voltage
Last Answer : Faraday's law of induced voltage
Show More
106 views
1 answer
asked
Jun 11, 2019
by
anonymous

Define natural, mechanical, forced and induced draught systems.
Last Answer : Natural draught system: - When the fuel is burnt (combustion) in the furnace due to natural circulation of air, the draught is called natural draught. Mechanical draught system: - In a mechanical ... combustion. OR If fan/blower is placed after the furnace then it is called as induced draught
Show More
91 views
1 answer
asked
Sep 7, 2018
by
anonymous

Compare statically induced emf with dynamically induced emf on any four points.
Last Answer : Statically induced emf Dynamically induced emf Emf is induced without any relative motion between conductor and magnetic field. Emf is induced due to relative motion between conductor ... induced in transformer windings e.g emf induced in Generator, Alternator armature windings
Show More
1.1k views
2 answers
asked
Sep 4, 2018
by
anonymous

Explain the term self induced EMF with a neat diagram.
Show More
84 views
0 answers
asked
Aug 8, 2018
by
anonymous

Define: 1) statically induced EMF 2) dynamically induced EMF Write the names of equipments in which these two types of EMF get induced
Last Answer : Concept of statically induced emf: The emf induced in coil or conductors without any relative motion between it and magnetic field is called statically induced emf. When conductor is stationary and flux ... it. This emf is dynamically induced emf. e.g. Emf induced in generators, alternator.
Show More
881 views
3 answers
asked
Aug 8, 2018
by
anonymous

List the two types of induced EMF.
Last Answer : There are two types of EMF one is statically induced EMF and second is dynamically induced EMF.
Show More
115 views
1 answer
asked
Aug 8, 2018
by
anonymous

How can we increase the induced current?
Last Answer : Induced current can be increased by reducing no of windings on the secondary part compared to primary.
Show More
89 views
1 answer
asked
Mar 14, 2018
by
anonymous

Explain dynamic and static induced emf with neat diagram.
Last Answer : Dynamically Induced EMF:- In this case, either coil moves or magnet moves, so that there is relative motion between coil & magnetic field. Thus magnetic field is cut by coil & emf is induced in it. The emf ... The expression for induced EMF is e= -L(di/dt) or = -N(dϕ/dt).
Show More
588 views
1 answer
asked
Apr 27, 2020
by
anonymous

The induced emf in the armature of a lap -wound four -pole dc machine having 100 armature conductors rotating at 600 rpm and with 1 Wb flux per pole is (1) 1000V (2) 100V (3) 600V (4) 10,000V
Last Answer : The induced emf in the armature of a lap -wound four -pole dc machine having 100 armature conductors rotating at 600 rpm and with 1 Wb flux per pole is 1000V
Show More
370 views
1 answer
asked
Apr 29, 2018
by
anonymous

Last Answer : If B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by Blv.
Show More
242 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : When the armature of a D.C. motor rotates, e.m.f. induced is back e.m.f.
Show More
203 views
1 answer
asked
Mar 20, 2018
by
anonymous
.jpg)
Which of the following laws relates the magnetic field to the magnitude, direction, length, and proximity of the electric current? A) Lenz’s law B) Faraday’s law C) Biot–Savart law D) None of these
Last Answer : Which of the following laws relates the magnetic field to the magnitude, direction, length, and proximity of the electric current? A) Lenz’s law B) Faraday’s law C) Biot–Savart law D) None of these
Show More
86 views
1 answer
asked
Apr 29, 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

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 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 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

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

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

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

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

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 : The direction of rotation of universal motor can be reversed the by reversing the flow of current through either armature winding or field winding.
Show More
247 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 : 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

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

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

What is the direction of flow when charging a capacitor?
Show More
74 views
0 answers
asked
Mar 15, 2018
by
anonymous

Field intensity formula
Last Answer : Field intensity formula
Show More
67 views
1 answer
asked
Jun 11, 2019
by
anonymous

Energy stored in electrostatic field of capacitance formula
Last Answer : Energy stored in electrostatic field of capacitance formula
Show More
82 views
1 answer
asked
Jun 11, 2019
by
anonymous

What arc the errors occurring in measuring devices due to stray magnetic field and temp '? Explain how to compensate them.
Last Answer : 1. Error due to stray magnetic fields- Main magnetic field gets disturbed by external magnetic fields known as stray magnetic fields. 2. Compensation technique To avoid this error, ... resistance alloy having a negligible resistance temp coefficient in the ratio of 1:10 for pressure coil
Show More
170 views
1 answer
asked
Sep 6, 2018
by
anonymous

Define junction field effect transistor (JFET) and give an example.
Last Answer : Junction Field-Effect Transistor: It is a semiconductor device having three terminals, namely Gate, Drain and Source, in which the current flow is controlled by an electric field set up by an external voltage applied ... : i) n-channel JFET and ii) p-channel JFET Examples of JFET: BFW 10, BFW 11
Show More
216 views
1 answer
asked
Sep 5, 2018
by
anonymous
.jpg)
Derive an expression for energy stored in a magnetic field .
Last Answer : Expression for energy stored in a magnetic field: The energy is stored in magnetic field when current increases and return back when the current decreases. At instant t' seconds after closer of switch ... energy absorbed by the magnetic field when current increases from 0 to I amperes
Show More
271 views
1 answer
asked
Sep 4, 2018
by
anonymous
