Recent questions tagged frequency

asked May 19, 2020 by anonymous

State the frequency and amplitude for both the voltage waveforms.

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asked Mar 29, 2020 by anonymous

Sinusoids find amplitude, period, frequency, voltage (Problem 1)

Last answer: Sinusoids find amplitude, period, frequency, voltage (Problem 1)

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asked Aug 21, 2019 by anonymous

Principal of digital frequency meter.

Last answer: The basic block diagram of basic digital frequency meter (DFM) is shown in above figure. The signal whose frequency we have to be measured is first to be amplified through amplifier. The output of amplifier ... = Number of counts. t = Time interval between start and stop condition of the gate.

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asked Aug 4, 2019 by anonymous

Define the following terms: 1) Virtual height 2) Actual height 3) Critical frequency. 4) Maximum usable frequency.

Last answer: 1) Virtual height:- The incident and refracted rays follow paths that are exactly the same as they have been if reflection had taken place from a surface located at a greater height, called ... angle of incidence is other than the normal is known as maximum unstable frequency. MUF= fc secθ

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asked Sep 6, 2018 by anonymous

Draw the diagram and explain the working of ferrodynamic type frequency meter.

Last answer: Ferrodynamic type frequency meter: (Electrical resonance type frequency meter): It consists of a fixed coil. The supply whose frequency is to be measured is connected across it. This coil ... so selected that the moving coil takes up a convenient position when frequency is of normal value.

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4.1k views 1 answer

asked Sep 6, 2018 by anonymous

List the different types of frequency meters.

Last answer: Different types of frequency meters 1. Reed type [Mechanical type] 2. Ferro-dynamic type [Resonances type] 3. Weston type 4. Ratio-meter type 5. Saturable core type 6. Digital type

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asked Sep 5, 2018 by anonymous

Explain working of Weston type frequency meter.

Last answer: Weston Type Frequency Meter: There are two fixed coils marked as A and B. Each coil divided into two equal parts and are fixed such that their magnetic axis are perpendicular to each ... leading to deflections in either direction depending on the currents there in, due to changed impedances.

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3.1k views 2 answers

asked Sep 5, 2018 by anonymous

State the application of phase sequence indicator; clip on ammeter, frequency meter & P.F. meter.

Last answer: Phase Sequence Indicator: 1. For finding correct phase sequence of supply 2. For obtaining exact instant of parallel operation of alternators. 3. For obtaining reversal of rotation ... 4. In electroplating industries 5. In various processes industries for measuring power factor

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asked Sep 5, 2018 by anonymous

List two types of oscillator, which generates frequency in RF range.

Last answer: Types of Oscillators generating frequencies in RF range: i) Hartley Oscillator ii) Colpitt’s Oscillator iii) Clapp Oscillator

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asked Sep 5, 2018 by anonymous

State the need of multistage amplifier. Draw frequency response of R-C coupled amplifier.

Last answer: The need of multistage amplifier The voltage (or power) gain, obtained from a single stage small signal amplifier, is limited. Therefore, it is not sufficient for all practical applications. Therefore, in ... to use a MULTISTAGE AMPLIFIER . Frequency response of R-C coupled amplifier.

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asked Aug 30, 2018 by anonymous

Classify the transformers based on the construction, frequency and power.

Last answer: Classification of Transformer Based On: i) Construction: Shell type, Core type, Berry type ii) Change in voltage level: Step-Up, Step-Down, iii) Number of phases: Single phase, Three phase iv) ... Control vi) Cooling: Self-cooled, Air-cooled, Forced-air cooled, Oil-cooled, Forced-oil cooled.

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asked Aug 8, 2018 by anonymous

Define: 1) frequency, 2) cycle, 3) time period, 4) amplitude

Last answer: 1) frequency: The total number of cycles completed in one second is called frequency. Its unit is cycles per second or Hertz (Hz). Its formula is f = 1/ T, where T is time period. ... is second per cycle. 4) amplitude: the maximum instantaneous value of sine wave is called as amplitude.

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118 views 2 answers