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Recent questions tagged frequency

1 answer 113 views

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

asked Sep 6, 2018 by Shimroz123
1 answer 9 views

List the different types of frequency meters.

asked Sep 6, 2018 by Shimroz123
2 answers 67 views

Explain working of Weston type frequency meter.

asked Sep 5, 2018 by Shimroz123
1 answer 24 views

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

asked Sep 5, 2018 by Shimroz123
1 answer 15 views

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

asked Sep 5, 2018 by Shimroz123
1 answer 22 views

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

asked Sep 5, 2018 by Shimroz123
1 answer 64 views
2 answers 51 views

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

asked Aug 8, 2018 by Quiz
1 answer 47 views

 A pulse radar has a pulse repetition frequency (PRF) of 3 KHz. If the radar is emitting at 10 GHz, what is the maximum unambiguous range for this radar? A) 5 Km B) 5 m C) 50 Km D) 15 m 

asked Jun 18, 2018 in Electrical Engineering by Shimroz123
1 answer 61 views

A pulse compression radar transmits an encoded pulse having a frequency chirp from 990 MHz to 1010 MHz centred around 1 GHz. The range resolution capability of this radar is A) 7.5 m B) 7.5 Km C) 75 m D) 750 m 

asked Jun 18, 2018 in Electrical Engineering by Shimroz123
1 answer 86 views

The clock frequency of an 8085 microprocessor based system is 3 MHz. What should be the minimum pulse width of the INTR signal so that it is recognized successfully? A) 5.6 µs B) 5.7 µs C) 5.8 µs D) 5.9 µs

asked Jun 18, 2018 in Microprocessors and Microcontrollers by Shimroz123
1 answer 343 views

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

asked Jun 18, 2018 in Electronics Engineering by Shimroz123
0 answers 94 views

The SCR would be turned OFF by voltage reversal of applied anode-cathode ac supply frequency of A) 10 kHz B) 10 Hz C) 5 kHz D) 5 Hz 

asked Jun 18, 2018 in Power Electronics by Shimroz123
1 answer 55 views

Which of the following thyristors can be used for high frequency of operation? A) TRIAC B) DIAC C) SCR D) GTO 

asked Jun 18, 2018 in Thyristor by Shimroz123
1 answer 14 views

In a series R-C circuit, with the increase in frequency, current (A) Reduces (B) Increases (C) Does not change (D) Becomes zero

asked May 8, 2018 in Electrical Engineering by Shimroz123
1 answer 22 views

A series R-L-C Circuit has a resonant frequency of 1000 Hz. If the values of R, L and C are doubled, the new resonant frequency is

asked May 8, 2018 in Electrical Engineering by Shimroz123
1 answer 73 views

What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage:  (A) Eddy Current and Hysteresis losses will be excessive  (B) Current will be too much high  (C) Transformer may start to smoke and burn  (D) No effect

asked May 8, 2018 in Electrical Engineering by Shimroz123
1 answer 38 views

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque  (1) Decreases (2) Increases (3) Remains constant (4) None of the above

asked May 1, 2018 in Electrical Machine by Shimroz123
1 answer 53 views
1 answer 21 views

In a series RLC high Q circuit, the current peaks at a frequency  (1) equal to the resonant frequency (2) greater than the resonant frequency (3) less than the resonant frequency (4) equal to half the resonant frequency

asked Apr 29, 2018 in Network Analysis by Shimroz123
1 answer 18 views

In a self-controlled synchronous motor fed from a variable frequency inverter  (1) the rotor poles invariably have damper windings  (2) there are stability problems  (3) the speed of the rotor decides stator frequency  (4) the frequency of the stator decides the rotor speed

asked Apr 29, 2018 in Power system by Shimroz123
1 answer 35 views

For a 500 Hz frequency excitation, a 50 km long power line will be modeled as

asked Apr 29, 2018 in Power system by Shimroz123
1 answer 35 views

What is the frequency of an alternator which has 2 poles and makes 3600 revolutions per minute? A) 3600 HZ B) 60 Hz C) 120 Hz D) None of these

asked Apr 29, 2018 in Electrical Engineering by Shimroz123
1 answer 28 views

What happens to the voltage in the secondary when the frequency of the supply in the primary is decreased? A) It increases B) It decreases C) It remains the same D) Cannot say unless the actual percentage increase in the frequency is known

asked Apr 29, 2018 in Electrical Engineering by Shimroz123
1 answer 25 views

The device which allows reverse power flow and withstands highest switch frequency is (A) GTO (B) MOSFET (C) IGBT (D) Inverter grade SCR

asked Apr 28, 2018 in Power Electronics by Shimroz123
1 answer 236 views

The time period of third harmonic of power supply frequency, in milliseconds, is (A) 20 (B) 3.33 (C) 6.66 (D) 60

asked Apr 28, 2018 in Network Analysis by Shimroz123
1 answer 40 views

Two waves have frequency of 500 Hz. One is set at its maximum value whereas the other at zero. The phase angle between them will be

asked Apr 26, 2018 in Electrical Measurements and Instrumentation by Shimroz123
1 answer 31 views

A 4 GHz carrier is amplitude modulated by a low-pass signal of maximum cut off frequency 1 MHz. lf this signal is to be ideally sampled, the minimum sampling frequency should be nearly

asked Apr 26, 2018 in Electronics Engineering by Shimroz123
1 answer 31 views

In a 741 Op-Amp, there is 20 dB/decade fall-off starting at a relatively low frequency. This is due to the (A) applied load (B) internal compensation (C) impedance of the source (D) power dissipation in the chip

asked Apr 26, 2018 in Electronics Engineering by Shimroz123
1 answer 14 views

An accelerometer has input range of 0 to 10g, natural frequency 30 Hz and mass 0.001 kg. The range of the secondary displacement transducer in mm required to cover the input range is (A) 0 to 2.76 (B) 0 to 9.81 (C) 0 to 11.20 (D) 0 to 52.10

asked Apr 26, 2018 in Electronics Engineering by Shimroz123
1 answer 37 views

The frequency of an alternating current is?

asked Mar 25, 2018 in Electrical Engineering by Shimroz123
1 answer 29 views

The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of?

asked Mar 25, 2018 in Electrical Engineering by Shimroz123
1 answer 19 views

In a series L-C circuit at the resonant frequency the?

asked Mar 25, 2018 in Electrical Engineering by Shimroz123
1 answer 17 views

In R-L-C series resonant circuit magnitude of resonance frequency can be changed by changing the value of?

asked Mar 25, 2018 in Electrical Engineering by Shimroz123
1 answer 21 views

For a frequency of 200 Hz, the time period will be?

asked Mar 24, 2018 in Electrical Engineering by Shimroz123
1 answer 27 views

Two waves of the same frequency have opposite phase when the phase angle between them is?

asked Mar 24, 2018 in Electrical Engineering by Shimroz123
1 answer 28 views

The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as?

asked Mar 20, 2018 in Synchronous machine by Shimroz123
0 answers 33 views

The maximum torque which a synchronous motor will develop at rest for any angular position of the rotor, at rated stator supply voltage and frequency, is known as?

asked Mar 20, 2018 in Synchronous machine by Shimroz123
1 answer 26 views

For given applied voltage, with the increase in frequency of the applied voltage?

asked Mar 19, 2018 in Transformer by Shimroz123
1 answer 31 views

Is the speed of alternator is directly proportional to frequency?

asked Mar 18, 2018 in Alternator by Shimroz123
0 answers 33 views

Which capacitor is used for high frequency?

asked Mar 15, 2018 in Electronics Engineering by Quiz
0 answers 17 views

What is meant by 3db frequency?

asked Mar 10, 2018 in Analog electronics circuits by Quiz
0 answers 26 views

What do you mean by frequency response of an amplifier?

asked Mar 10, 2018 in Analog electronics circuits by Quiz
0 answers 18 views

Why the cutoff frequency is taken for 3db?

asked Mar 10, 2018 in Analog electronics circuits by Quiz

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