What is an RF Power Meter?

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asked Mar 10, 2018 by anonymous

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What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016

What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these

Last answer: What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these

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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 Mar 21, 2018 by anonymous

In a single phase power factor meter the phase difference between the currents in the two pressure coils is?

Last answer: In a single phase power factor meter the phase difference between the currents in the two pressure coils is exactly 90°.

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asked Sep 22, 2018 by anonymous

Explain the “mitigation of power theft” and “faulty meter replacement” for energy conservation techniques to reduce commercial losses.

Last answer: Energy conservation techniques to reduce commercial losses: 1. Mitigation of Power Theft: Power theft being the most important issue which all of the service providing utilities ... agricultural sector. Prepaid meters may prove effective measures against unauthorized abstraction of energy.

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asked Sep 6, 2018 by anonymous

With a neat sketch explain working of 1 phase dynamometer type power factor meter.

Last answer: Working of 1 phase dynamometer type power factor meter : The current coil is connected in series with load. Two pressure coils marked as A and B are connected across the supply terminals ... becomes stationary and the pointer shows steady deflection corresponding to the power factor of the load.

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asked Mar 21, 2018 by anonymous

In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at?

Last answer: In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at 120°.

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asked Mar 21, 2018 by anonymous

The two pressure coils of a single phase power factor meter have?

Last answer: The two pressure coils of a single phase power factor meter have the same dimensions and the same number of turns.

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asked Mar 21, 2018 by anonymous

A power factor meter has?

Last answer: A power factor meter has one current circuit and two pressure circuits.

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An induction type energy meter is found to run fast. Correction for this error can be made by

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Last answer: An induction type energy meter is found to run fast. Correction for this error can be made by Moving the brake magnet away from the centre of the disc.

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asked Mar 21, 2018 by anonymous

The adjustment of position of shading bands, in an energy meter is done to provide?

Last answer: The adjustment of position of shading bands, in an energy meter is done to provide friction compensation.

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asked Mar 21, 2018 by anonymous

An induction meter can handle current up to?

Last answer: An induction meter can handle current up to 100 A.

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Last answer: Energy Meter Constant A fixed value which is used when converting meter readings to actual energy use, especially when potential transformers and similar types of equipment are used in metering. For example, K=--------rev/Kwh

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What is the best power factor?

Last answer: It is unity power factor but difficult to achieve in dynamic loads

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Last answer: Reduced copper losses Smaller conductor size Improve voltage regulation Increase system capability Less energy bill

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What is meant by power dip?

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What are the power quality disturbance?

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What can you do to prevent a power surge?

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What would cause a power surge in a house?

Last answer: If your neibour / other flat owners / your maintainer staff switch on any type of inductive load that can cause power surge / dip

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asked Sep 5, 2018 by anonymous

Why energy meter is integrating type measuring instrument?

Last answer: Energy Meter is Integrating Type Measuring Instrument: Energy meter is used for measurement of energy, which is obtained by integration (summation) of power supplied over the particular time duration, hence it the integrating type measuring instrument.

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asked May 8, 2018 by anonymous

kWh meter is the electric meter that measures the amount of electrical _________ in kWh that

kWh meter is the electric meter that measures the amount of electrical _________ in kWh that was consumed in the house. (A) Energy (B) Current (C) Voltage (D) None of the above

Last answer: kWh meter is the electric meter that measures the amount of electrical Energy in kWh that was consumed in the house.

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asked Apr 30, 2018 by anonymous

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asked Apr 29, 2018 by anonymous

A moving coil of meter has 100 turns, and a length and depth of 10mm and 20mm respectively. It is positioned

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Last answer: A moving coil of meter has 100 turns, and a length and depth of 10mm and 20mm respectively. It is positioned in a uniform radial flux density of 200 mT. The coil carrier current capacity is 50 mA. The torque on the coil is 200µNm

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asked Apr 28, 2018 by anonymous

The meter which does not have any component in it to provide control torque is

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Last answer: The meter which does not have any component in it to provide control torque is Electrodynamometer for power factor measurement.

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asked Apr 28, 2018 by anonymous

A 200 V, 5 A d.c. energy meter is tested at its marked ratings. The resistance of the pressure circuit is 8000 Ω

A 200 V, 5 A d.c. energy meter is tested at its marked ratings. The resistance of the pressure circuit is 8000 Ω and that of current coil is 0.1 Ω. The power consumed when testing the meter with phantom loading with current circuit excited by a 6 V battery is (A) 2.5 W (B) 5 W (C) 32.5 W (D) 35 W

Last answer: A 200 V, 5 A d.c. energy meter is tested at its marked ratings. The resistance of the pressure circuit is 8000 Ω and that of current coil is 0.1 Ω. The power consumed when testing the meter with phantom loading with current circuit excited by a 6 V battery is 35 W

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asked Apr 28, 2018 by anonymous

Phantom loading for testing of energy meter is used

Phantom loading for testing of energy meter is used (A) to isolate the current and potential circuits (B) to increase power loss during testing (C) for meters having low current ratings (D) to test meters having a large current rating for which loads may not be available

Last answer: B

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The disc of a single phase Induction-type energy meter makes 60 revolutions in 6 minutes. Meter Constant is

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Last answer: The disc of a single phase Induction-type energy meter makes 60 revolutions in 6 minutes. Meter Constant is 1200 rev/kWh. Power consumption in the load is 500 W

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Last answer: One newton meter is same as one joule.

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Last answer: A Weston frequency meter is moving iron instrument.

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Last answer: The household energy meter is an integrating instrument.

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Last answer: Working : Initially the switch S is kept at position 1.The attenuator gets excluded and the bridge T network is adjusted for full suppression of fundamental frequency and hence we get ... is obtained on the meter.Thus the total rms distortion is indicated by the reading of attenuator.

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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 17, 2019 by anonymous

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Last answer: Clip-on meter is used to measure the High value AC current without breaking the circuit Or without opening the circuit.

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asked Aug 5, 2019 by anonymous

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What is an RF Power Meter?

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