What is the speed of an electromagnetic wave in water?

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Description : How fast is an electromagnetic wave?

Description : Justify electromagnetic wave is said to be transverse wave. 

Answer : Transverse electromagnetic wave:- The electromagnetic waves are oscillations which propagate through free space. In electromagnetic waves the direction of electric field, magnetic field & propagation are ... electric field vector with respect to the surface (i.e. looking at the horizon) 

Description : What is an example of an electromagnetic?

Description : What are the electromagnetic waves used in remote control?

Description : What are the dangers of electromagnetic waves?

Description : What do you mean by electromagnetic field?

Description : What is the definition of electromagnetic force?

Description : What is the frequency range of VHF electromagnetic waves? A) 30-300 kHz B) 30-3000 kHz C) 30-300 MHz D) 30-3000 MHz

Answer : What is the frequency range of VHF electromagnetic waves? A) 30-300 kHz B) 30-3000 kHz C) 30-300 MHz D) 30-3000 MHz

Description : Define Faraday’s first law of electromagnetic induction. 

Answer : Faraday’s First Law: Whenever a changing magnetic flux links with a conductor, an emf is induced in that conductor.  OR  When a conductor cuts across magnetic field, an emf is induced in that conductor.

Description : State advantages & disadvantages of electromagnetic flow meter.

Answer : Advantage: Provides wide linear range. 2) Ability to measure reverses flow. 3) Gives rapid response to flow changes. 4) No obstruction is created to flow. 5) It can handle corrosive as ... and pipe networks with relatively short inside diameters. 3) It is useful for electrically conducting fluid.

Description : i) Explain electromagnetic spectrum with neat diagram. ii) Explain atmospheric noise with example. 

Answer : Explanation:-  The electromagnetic spectrum is the range of frequencies of electromagnetic radiation and their respective wavelengths  The electromagnetic spectrum covers ... spread over the complete frequency spectrum used for radio communication.  Example: Lightning 

Description : State Faraday's law of electromagnetic induction.

Answer : First Law: - Whenever change in the magnetic flux linked with a coil or conductor, an EMF is induced in it. OR Whenever a conductor cuts magnetic flux, an EMF is induced in conductor.  Second Law: ... of induced EMF is directly proportional to (equal to) the rate of change of flux linkages.

Description : What is the best water to drink to be healthy?

Answer : The physiological sensation of thirst is a sure sign that the body is in a critical situation. According to the very minimum estimates, our body loses at least 2 liters of fluid per day. Regular ... A glass of water consumed in the morning on an empty stomach will start up the internal mechanisms.

Description : What is Sassi water and how to prepare it?

Answer : What is Sassi water and how to prepare it? A large number of people dream of getting rid of extra pounds. Moreover, some of them, in order to achieve the goal, are ready to use rather dangerous and ... do any harm, and the result of its application will be getting rid of edema and a toned stomach.

Description : Classify hydro-electric power plants according to water flow regulation and explain in brief.

Answer : Classification of hydro-electric power plants according to water flow regulation of water flow:-  1. Large reservoir power plant 2. Run-off river (ROR) power plant with poundage 3. Run-off River ... depends upon rate of flow of water Initial cost is less Its purpose is to generate electricity.

Description : Distinguish between fire tube and water tube boilers in steam power plant.

Answer : Fire Tube boiler Water Tube boiler In fire tube boilers hot gases are passed through the tubes and water surrounds these tubes. In these boilers water is inside the tubes and hot gases are ... risk of explosion due to low pressure. Risk of explosion is more due to high pressure.

Description : Define : i) Average value ii) RMS value of an AC Wave.

Answer : i) Average value: The average value is defined as the average of all instantaneous values during one alternation . That is, the ratio of the sum of all considered instantaneous values to the ... as produced by the alternating current when flowing through the same resistance for the same time.

Description : The fractional-pitch used for eliminating 7th harmonic from the emf wave of an alternator is (A) 2/3 (B) 5/6 (C) 7/8 (D) 6/7

Answer : The fractional-pitch used for eliminating 7th harmonic from the emf wave of an alternator is 6/7

Description : 40 Facts You Should Know About Water

Answer : Water is composed of two elements, hydrogen and oxygen. Its chemical formula is H2O This is a fact that everyone knows. But here we will show you 40 facts on the water !!! After reading, I ... a report estimating that 85 million people visited the 1,300 water parks in the US in 2015 alone;

Description : Explain working of a storage type water cooler with a sketch. 

Answer : The storage type cooler has the evaporator coil soldered on to the walls of the storage tank of the cooler, generally on to the outside surface of the walls. The tank could be of the ... outside at a lower level, much below the lower most evaporator refrigerant tube soildered on to the tank. 

Description : State the location and function of i) Economizer ii) Feed water heater.

Answer : (i) Economizer:-  Location: - It is placed in the path of flue gases in between the exit from the furnace and the chimney. OR In The way of feed water before boiler. Function: - ... economizer. Function: - Its function is to increase the temperature of feed water by using blade steam.

Description : What are the advantages and disadvantages of wave energy?

Answer : AdvantagesFree from pollutionAvailable for every timeThe water can reuse as drinking purposeDisadvantageMore costLarge maintenanceDifficult to constructAquatic life get affected

Description : what is mean by sine wave?

Answer : Hi, Sine wave means it is the wave form of sinusoidal wave generally of voltage or current. It takes the path of positive & negative half cycles. 1 set of positive and negative half cycles is called 1 cycle. frequency is no. of cycles per second (HZ). Thanks K.Srikanth

Description : Draw single phase full wave mid-point converter for inductive load. Draw input and output waveforms for it. 

Answer : Circuit Diagram: Waveforms:

Description : operation of half wave rectifier type AC Voltmeter.

Answer :  Half-wave Rectifier Voltmeter The d'Arsonval meter movement only responds to the average or dc value of the current through the moving coil. In order to measure alternating ... ) input voltage signal alternating signal needs to be rectified first by using diode rectifier to produce 

Description : State the concept of continuous wave RADAR. Sketch its block diagram. State its any two applications.

Answer : Concept- Transmission is continuous here, the circulator is used to provide isolation between the transmitter and the receiver. Since transmission is continuous, it would be pointless to use a ... It is used to measurement of relative velocity to distinguish moving target from stationary objects 

Description : State advantages and disadvantages of continuous wave Radar

Answer : Advantages continuous wave RADAR : 1.Single frequency transmission and hence narrow receiver bandwidth 2.Duty cycle is unity, so mean power can be as high as transmitters will permits. 3.Ability ... required for receiver and transmitter. 3.Cannot detect targets crossing its beam at right angles.

Description : Give the operation of single phase full wave bridge controlled converter with RL load with a neat diagram. Also draw its waveform.

Answer : Single phase fully control bridge converter with RL load: 1. During positive half cycle of input voltage, T1 and T2 are forward biased and during negative half cycle, T3 and T4 are forward biased. Therefore, T1-T2 ... cycle till the firing of next pair of SCRs as shown in the waveform.

Description : Draw a neat diagram of 1Ф half wave controlled converter with RL load. Give its operation.

Answer : Single phase fully controlled half wave converter:  The circuit diagram of single-phase half-wave controlled rectifier with RL load and without freewheeling diode is shown in Fig. (a). The SCR T is ... , when again pulse is applied, the SCR is turned on & the above cycle is repeated. 

Description : Instantaneous value of a sine wave voltage

Answer : Instantaneous value of a sine wave voltage

Description : Draw a labeled block diagram of sine wave generator and state function of each block. 

Answer : Function Generator:  This instrument can deliver sine, triangular & square waves with frequency range of 0.01 Hz to 100 kHz.  The frequency control network is governed by a frequency ... voltage reaches a predetermined level on the negative slope of the integrator's output voltage.

Description : Explain full wave bridged rectifier with the help of circuit diagram and input output waveform.

Answer : 1. In positive half cycle (0 to Π): The end A of the secondary winding becomes positive and end B negative. This makes diode D1 and D4 forward biased while diode D2 and D3 are reverse biased. These two diodes will ... D2 and D3 when it is conducting is as follows.  B - D2 - RL - D3 - A 

Description : The coefficient of reflection for current wave is

Answer : The coefficient of reflection for current wave is 1 or -1

Description : The velocity of travelling wave through a cable of relative permittivity 36 is

Answer : The velocity of travelling wave through a cable of relative permittivity 36 is 0.5 x 108 m/sec

Description : The equation of 50 Hz current sine wave having r.m.s. value of 60 A is?

Answer : (60*√2)Sin(2π*50*t)

Description : Form factor for a sine wave is?

Answer : 1.11

Description : For a sine wave with peak value Imax the r.m.s. value is?

Answer : For a sine wave with peak value Imax the r.m.s. value is 0.707.

Answer : The peak value of a sine wave is 200 V. Its average value is 127.4 V.

Answer : The period of a wave is time required to complete one cycle.

Answer :  A sine wave has a frequency of 50 Hz. Its angular frequency is 100 n radian/second.

Answer : Wave winding is composed of that even number which is exact multiple of poles + 2.

Answer : A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave will be of 5 Hz.

Answer : Wave trap is used to trap waves of higher frequencies entering generator or transformer units.

Answer : When a transmission line is energized, the wave that propagates on it is current wave and voltage wave.

Description : Explain three phase half wave controller or three phase unidirectional controller.

Answer : Three phase half wave controller or unidirectional controller:

Description : Explain three phase full wave controller.

Answer : Three phase full wave controller: Three phase full wave controller is also called as the three-phase bidirectional controller. Let the load is star connected so at each phase there are antiparallel connected SCRs. ... conduct at the same time and the third phase will be open.

Description : Which countries are using wave energy?

Answer : The following countries are using wave energy :GreecePortugalUnited StatesUnited KingdomSpainIsraelSweden

Description : In an adjustable speed ac drive which quantity gets reduced above rated speed ? (A) developed torque (B) stator frequency (C) reduced starting torque (D) stator current

Answer : In an adjustable speed ac drive which quantity gets reduced above rated speed ? (A) developed torque (B) stator frequency (C) reduced starting torque (D) stator current

Description : An electric motor in which both stator field and rotor rotates with same speed is called?

Answer : An electric motor in which both stator field and rotor rotates with same speed is called synchronous motor.

Answer : An alternator coupled to a hydraulic turbine runs at slow speed, as compared to others.

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