What is the direction of the induced current?
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Mar 14, 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
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174 views
1 answer
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Mar 15, 2018
by
anonymous

Why does increase in current mean a decrease in voltage?
Last Answer : This is because current flows from high potential to low potential to bring the two diffrent potential to unity , thus a reduced potential (voltage)
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166 views
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Mar 10, 2018
by
anonymous

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.
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Aug 17, 2019
by
anonymous

Self induced voltage across an inductance
Last Answer : Self induced voltage across an inductance
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Jun 11, 2019
by
anonymous

Faraday's law of induced voltage
Last Answer : Faraday's law of induced voltage
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106 views
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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
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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
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Sep 4, 2018
by
anonymous

Explain the term self induced EMF with a neat diagram.
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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.
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881 views
3 answers
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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.
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Aug 8, 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.
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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).
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Apr 27, 2020
by
anonymous
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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
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Apr 29, 2018
by
anonymous
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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.
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Mar 20, 2018
by
anonymous
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Last Answer : When the armature of a D.C. motor rotates, e.m.f. induced is back e.m.f.
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Mar 20, 2018
by
anonymous

What are three ways you can increase the strength of an electromagnet?
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Mar 14, 2018
by
anonymous

How to Increase Gas Mileage
Last Answer : How to Increase Gas Mileage Gasoline is a top priority in the budget of any car owner. You'll be surprised at how much you spend on gasoline in between refills, especially if you drive every day. With ... , but also save big money on trips to the fuel pump and refills for your car's fuel tank.
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May 11, 2021
by
anonymous

How to Increase Fiber in Your Diet ?
Last Answer : How to Increase Fiber in Your Diet Increasing fiber in your diet has many health benefits. Fiber is shown to lower cholesterol levels, lower the chances of getting type 2 diabetes, decrease the possibility ... of eight to ten glasses of water daily. The water helps your body digest the fiber faster.
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1 answer
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May 9, 2021
by
anonymous

Last Answer : The size of a synchronous motor decreases with the increase in flux density.
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196 views
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Mar 20, 2018
by
anonymous

Reduction in core losses and increase in permeability are obtained with transformer employing?
Last Answer : Reduction in core losses and increase in permeability are obtained with transformer employing core built-up of laminations of cold rolled grain oriented steel.
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Mar 19, 2018
by
anonymous
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For given applied voltage, with the increase in frequency of the applied voltage?
Last Answer : For given applied voltage, with the increase in frequency of the applied voltage eddy current loss will remain unchanged.
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Mar 19, 2018
by
anonymous

a dc generator has a terminal voltage of 250V and an induced voltage of 262V when the generator is loaded. the brush drop is 1volt per brush and the armature resistance is 0.03 ohm ... reaction and determine the following: the load current the power of the load the percentage voltage regulation.
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Aug 3, 2021
by
yanga

In a series R-C circuit, with the increase in frequency, current (A) Reduces (B) Increases (C) Does not change (D) Becomes zero
Last Answer : In a series R-C circuit, with the increase in frequency, current Increases
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May 8, 2018
by
anonymous

Why do we use AC current in our homes?
Last Answer : We used it for cooking rice, For washing clothes and for lights in the house.
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193 views
3 answers
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Mar 11, 2018
by
anonymous

Direct Current (DC) Next Topic : Alternating current (AC)
Last Answer : Direct Current (DC) is the unidirectional electric current. Uni meaning is one. And the flow of charge in same direction. We know that conventional current flow from positive terminal of battery to ... The magnitude of DC may constant or vary but direction do not change with respect to time.
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Nov 22, 2019
by
anonymous

Alternating current (AC)
Last Answer : AC stands for Alternating Current meaning voltage or current that changes polarity or direction respectively over time. An Alternating Current (AC) is an electric current whose magnitude ... energy are known as alternators and are simpler construction than DC electromechanical generators.
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181 views
2 answers
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Nov 22, 2019
by
anonymous

Does current flow through a capacitor ?
Last Answer : Imagine a pipe with a flexible diaphram in the middle separating two haves of the pipe. Now the pipe is filled with air. If you apply a pressure to one end the diaphram will deform ... capacitor, the effects on electrons will be recreated across the boundary. But theres no electrical connection...
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1 answer
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Aug 25, 2019
by
anonymous

What kills, current or voltage?
Last Answer : Current would kill. You can actually have thousands of bolts going through you and not even know it. Yes you probably know already voltage is current times resistance. Since your body is a resistor it would take just a small amount of current to create a very high voltage
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149 views
3 answers
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Aug 25, 2019
by
anonymous

A charge of 0.1 C moves past a given point every 0.01 s. How much is the current?
Last Answer : The current is 10.0A. 1ampere = 1 Coulomb per 1 second. 0.1Coulombs ÷ 0.01seconds = 10.0amperes.
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414 views
1 answer
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Jul 1, 2019
by
anonymous

Describe the difference between direct and alternating current.
Last Answer : Direct current is the flow of electricity or charge in one direction.. Alternative current is the flow of charge that doesn't flow in one direction.
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4 answers
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Jun 29, 2019
by
anonymous

Explain why potential difference is necessary to produce current in a circuit.
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Jun 29, 2019
by
anonymous
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Kirchhoff's Current Law
Last Answer : Kirchhoff's current law
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Jun 11, 2019
by
anonymous

Current ratio
Last Answer : Current ratio
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Jun 11, 2019
by
anonymous

Current divider rule
Last Answer : Current divider rule
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Jun 11, 2019
by
anonymous

Current formula
Last Answer : Current formula
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1 answer
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Jun 11, 2019
by
anonymous

Capacitive current
Last Answer : Capacitive current formula
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1 answer
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Jun 11, 2019
by
anonymous

How to find total impedance Z, current I and Impedance angle ?
Last Answer : How to find total impedance Z, current I and Impedance angle ?
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165 views
2 answers
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May 30, 2019
by
anonymous

Why inductor current lags inductor voltage ?
Last Answer : Inductor is a wire wounding structure having a core material it induces emf which is opposite to the voltage supply and proportional to rate of change of current so current lags the voltage in inductor
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112 views
1 answer
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May 24, 2019
by
anonymous

Explain lagging quantity and leading quantity, explain this concept with voltage and current waveform
Last Answer : When two alternating quantities attain their respective zero or peak values simultaneously, the quantities are said to be in-phase quantities. When the quantities do not attain their respective zero or ... current is leading the voltage or the voltage is said to be lagging behind the current.
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139 views
1 answer
asked
Sep 7, 2018
by
anonymous
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List out any four effects of electric current used in measuring instruments & write name of meter working on it.
Last Answer : Effects of Electric Current used in measuring instruments: 1. Magnetic Effect: PMMC and Moving Iron type Ammeters, voltmeter and Dynamometer type wattmeters etc. 2. Electromagnetic induction ... . Electrostatic effect: Voltmeters. 5. Hall Effect: Flux meter, Poynting vector wattmeter.
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996 views
1 answer
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Sep 6, 2018
by
anonymous

State various effects of electric current and explain any one.
Last Answer : Effects of Electric Current: 1. Magnetic Effect: When a current is passed through a conductor, magnetic field is produced round the conductor. Due to this field when current carrying ... The rise in temperature is converted into elongation of hot wire element causes displacement of pointer.
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115 views
2 answers
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Sep 4, 2018
by
anonymous

A 1000Ohm, 1 Watt resistor can safely pass a current of
Last Answer : A 1000 Ohm, 1 Watt resistor can safely pass a current of 30 mA
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457 views
1 answer
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May 8, 2018
by
anonymous

Step-down transformer converts high voltage and low current into: (A) How voltage and high current (B) High voltage and low current (C) Low voltage and high current (D) None of the above
Last Answer : Step-down transformer converts high voltage and low current into: Low voltage and high current
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123 views
1 answer
asked
May 8, 2018
by
anonymous

Which of the following is the least expensive protection for over current in low voltage system? (A) Rewireable fuse (B) Isolator (C) Oil Circuit breaker (D) Air break circuit breaker
Last Answer : Which of the following is the least expensive protection for over current in low voltage system? (A) Rewireable fuse (B) Isolator (C) Oil Circuit breaker (D) Air break circuit breaker
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260 views
1 answer
asked
May 8, 2018
by
anonymous

For a round wire, the approximate value of fusing current is given by
Last Answer : For a round wire, the approximate value of fusing current is given by K√d3
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194 views
1 answer
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May 3, 2018
by
anonymous

A current controlled voltage source is equivalent to : (A) series voltage feed -back amplifier (B) shunt current feed -back amplifier (C) shunt voltage feed -back amplifier (D) series current feed -back amplifier
Last Answer : A current controlled voltage source is equivalent to : shunt voltage feed -back amplifier
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119 views
1 answer
asked
Apr 30, 2018
by
anonymous

Which of the following can reduce the Eddy current losses? A) By making the core of a stack of plates electrically insulated from each other B) By making the core of solid block C) By increasing the applied voltage D) None of these
Last Answer : Which of the following can reduce the Eddy current losses? A) By making the core of a stack of plates electrically insulated from each other B) By making the core of solid block C) By increasing the applied voltage D) None of these
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90 views
1 answer
asked
Apr 29, 2018
by
anonymous

A network that consists of at least a voltage source or current source is called A) Active network B) Ideal network C) Sourced network D) Outsourced network
Last Answer : A network that consists of at least a voltage source or current source is called Active network
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118 views
1 answer
asked
Apr 29, 2018
by
anonymous

The current flow in a battery is due to ______ A) movement of ions B) movement of protons C) movement of holes D) movement of neutrons
Last Answer : The current flow in a battery is due to movement of ions
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104 views
1 answer
asked
Apr 29, 2018
by
anonymous
