# Wave trap is used to trap waves of?

## 1 Answer

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

## Related questions

Description : Wave trap is used to trap waves of:  (A) Power frequencies (B) Higher frequencies entering generator or transformer units (C) All of the above (D) None of the above

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

Description : In 8085, whenever a signal is received at TRAP terminal, its program execution is transferred to a subroutine on address A) 0000 H B) 002C H C) 0024 H D) 0004 H

Answer : In 8085, whenever a signal is received at TRAP terminal, its program execution is transferred to a subroutine on address 0024 H

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

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 : 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)

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.

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 : 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 : 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.

Description : What is the speed of an electromagnetic wave in water?

Description : How fast is an electromagnetic 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 : 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 : What are the electromagnetic waves used in remote control?

Description : IDMT relays are used to protect the transformer against :  (A) Internal short -circuits (B) Open circuits (C) External short circuits (D) Oil leakage

Answer : IDMT relays are used to protect the transformer against : External short circuits

Description : Series reactors are used to

Answer : Series reactors are used to bring down the fault level within the capacity of the switchgear

Answer : Series capacitors are used to compensate for line inductive reactance.

Answer : A.C. network analyser is used to solve problems of load flow, short-circuit and stability.

Description : Light triggering is mainly used in

Answer : Light triggering is mainly used in High voltage direct current transmission

Description : A relay used for protection of motors against overload is :  (A) Impedance relay (B) Electromagnetic attraction type (C) Thermal relay (D) Buchholz's relay

Answer : A relay used for protection of motors against overload is : Thermal relay

Description : Earthing switch is used for?  (A) Measuring of safety voltage (B) Protection of equipment from ground faults (C) Discharging residual energies (D) All of the above

Answer : Earthing switch is used for?  (A) Measuring of safety voltage (B) Protection of equipment from ground faults (C) Discharging residual energies (D) All of the above

Description : Auto reclosing is used in case of

Answer : Auto reclosing is used in case of air blast C.B.

Description : A negative sequence relay is used for protection of  (1) Generator (3) Motor (2) Transformer (4) Long Transmission lines

Answer : A negative sequence relay is used for protection of Generator

Description : The material used in liquid fuses is  (1) SF6 (3) carbon tetra chloride (2) distilled water (4) transformer oil

Answer : The material used in liquid fuses is  carbon tetra chloride

Description : ln a minimum oil circuit breaker the oil is used

Answer : ln a minimum oil circuit breaker the oil is used to act as circuit breaking medium only

Description : Regulating-transformers are used in power systems for control of

Answer : Regulating-transformers are used in power systems for control of power flow

Description : Surge absorbers are used for protection against

Answer : Surge absorbers are used for protection against low voltage high frequency oscillations

Answer : A switchgear is device used for switching, controlling and protecting the electrical circuit and equipment.

Answer : The material used for fuse must have low melting point and high specific resistance.

Answer : The inverse definite mean time relays are used for over current and earth fault protection of transformer against internal short-circuits.

Answer : The single phasing relays are used for the protection of three phase motors.

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