Is 50hz or 60hz better?

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asked Mar 10, 2018 by anonymous

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Why INDIA has 50hz and USA has 60hz frequency cycle of current?

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The existence of a Parallel Economy or Black Money (1) makes the economy more competitive (2) makes the monetary policies less effective (3) ensures a better distribution of income and wealth (4) ensures increasing productive investment

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asked Jan 7 by anonymous

A series combination of resistance 100 ohm and capacitance 50µf is connected in series to a 230 V, 50HZ supply. Calculate (i) Capacitive reactance (ii) Current (iii) Power factor (iv) Power consumed

Last answer: For RC series circuit

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asked May 25, 2020 by anonymous

An instantaneous value of an alternating voltage having 50hz frequency and max value of 100v at 0.01sec is

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asked Nov 12, 2018 by anonymous

The inductance if a resistance with a rating of 100watts at 100volts is connected in series with a inductor across 220volts/50hz

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asked May 25, 2018 by anonymous

A 6-pole, 50Hz, 3-φ induction motor is running at 950 r.p.m. and has Cu loss of 5kW. The rotor input is

A 6-pole, 50Hz, 3-φ induction motor is running at 950 r.p.m. and has Cu loss of 5kW. The rotor input is (a) 10 kW (b) 95 kW (c) 100 kW (d) 9.5 kW

Last answer: s=(Ns-N)/Ns =(1000-950)/1000=0.05.rotor cu.loss= s*rotor inputwe have rotor cu loss=5kWtherefore, rotor input= rotor cu.loss/s =5kW/0.05 =100 kW

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asked May 22, 2018 by anonymous

If a 3-phase, 400V, 50Hz, 4 pole induction motor is running at a slip of 5% then the relative speed of rotor

If a 3-phase, 400V, 50Hz, 4 pole induction motor is running at a slip of 5% then the relative speed of rotor field with respect to stator filed is:

Last answer: If a 3-phase, 400V, 50Hz, 4 pole induction motor is running at a slip of 5% then the relative speed of rotor field with respect to stator filed is: zero

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asked Apr 28, 2018 by anonymous

An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW.

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Last answer: An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW. Its rotor input is 83.33 kW

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asked May 11, 2020 by ali56789

A3-phase, 5.5kW, 440V, 50Hz, cylindrical rotor S.M has synchronous reactance of (0+j2) Ω/phase

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A 3-phase, 4-pole, 50Hz induction motor runs at a speed of 1440 rpm. The rotating field produced by the rotor

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Last answer: 0

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asked Apr 11, 2018 by anonymous

A 400kW, 3 -phase, 440V, 50Hz induction motor has a speed of 950 rpm on full load. The machine has 6 poles. ...

A 400kW, 3 -phase, 440V, 50Hz induction motor has a speed of 950 rpm on full load. The machine has 6 poles. The value of slip for the machine will be (A) 0.06 (B) 0.10 (C) 0.04 (D) 0.05

Last answer: A 400kW, 3 -phase, 440V, 50Hz induction motor has a speed of 950 rpm on full load. The machine has 6 poles. The value of slip for the machine will be 0.05

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asked 1 day ago by anonymous

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asked Jan 9 by anonymous

Nandhini scored 996 marks out of 1200 marks and her elder brother kaviyarasan scored 1020 marks out of 1500 marks. Find the scored percentage which is better? a) 68% b) 83% c) 65% d) 85% e) 97%

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asked Aug 11, 2018 by nbattack

is it DC better than AC to transmit? explain it.

Do you think is DC better than AC to transmit energy?

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asked May 12, 2018 by anonymous

The transformer which transforms unbalanced line to a balanced line is better known as

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Last answer: The transformer which transforms unbalanced line to a balanced line is better known as Balun

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asked Apr 26, 2018 by anonymous

An FET is a better chopper than a BJT because it has

An FET is a better chopper than a BJT because it has (A) lower offset voltage (B) higher series ON resistance (C) lower input current (D) higher input impedance

Last answer: An FET is a better chopper than a BJT because it has lower offset voltage

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asked Apr 14, 2018 by anonymous

What is the ratio of resistance and impedance better known as ?

What is the ratio of resistance and impedance better known as ? (A) Peak factor (B) Pitch factor (C) Power factor (D) Form factor

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asked Apr 11, 2018 by anonymous

Power factor of running induction motor is better when

Power factor of running induction motor is better when (1) Running at half load (2) Full load (3) ¾ of load (4) None of the above

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asked Apr 10, 2018 by anonymous

An open-loop system is better than a closed-loop system in terms of

An open-loop system is better than a closed-loop system in terms of (a) Accuracy (b) Stability (c) Noise reduction (d) Sensitivity

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asked Apr 10, 2018 by anonymous

In terms of cost, overhead transmission line is better than underground transmission line in the field of

In terms of cost, overhead transmission line is better than underground transmission line in the field of (a) Insulation (b) Right of way (c) Visibility (d) None of these

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asked Mar 31, 2018 by anonymous

For making capacitors, it is better to select a dielectric having_________.

Last answer: For making capacitors, it is better to select a dielectric having high permittivity.

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asked Mar 27, 2018 by anonymous

For reducing tower footing resistance it is better to Use

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asked Mar 8, 2018 by anonymous

Why the power factor of semiconverter is better than full converter?

Last answer: Power factor of semiconverter is better than full converter

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asked Aug 22, 2017 by anonymous

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asked Jun 4, 2018 by anonymous

The breakeven distance for HVDC transmission is

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asked May 13, 2018 by anonymous

Which of the following is TRUE with respect to HVDC transmission line?

Which of the following is TRUE with respect to HVDC transmission line? (A) For a short distance it is economical over HVAC. (B) In HVDC system, harmonics are not generated. (C) Use of HVDC can improve system stability. (D) Less and cheap terminal, equipments are required in HVDC.

Last answer: Which of the following is TRUE with respect to HVDC transmission line? (A) For a short distance it is economical over HVAC. (B) In HVDC system, harmonics are not generated. (C) Use of HVDC can improve system stability. (D) Less and cheap terminal, equipments are required in HVDC.

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asked Apr 28, 2018 by anonymous

A Unified Power Flow Controller (FACTS controller) is a voltage source converter based

A Unified Power Flow Controller (FACTS controller) is a voltage source converter based (A) Inter-phase power controller (B) Static Compensator (C) Combination of series and shunt compensators (D) Solid-state series compensator

Last answer: A Unified Power Flow Controller (FACTS controller) is a voltage source converter based Combination of series and shunt compensators

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asked Apr 28, 2018 by anonymous

In voltage source converter based HVDC transmission system the active power is controlled by changing

In voltage source converter based HVDC transmission system the active power is controlled by changing (A) phase angle of the converter ac input voltage (B) supply frequency of the converter ac input voltage (C) magnitude of the converter ac input voltage (D) DC voltage at the inverter terminals

Last answer: In voltage source converter based HVDC transmission system the active power is controlled by changing phase angle of the converter ac input voltage

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asked Apr 9, 2018 by anonymous

In the case of second order differential equation if the damping ratio is unity, then the poles are...

In the case of second order differential equation if the damping ratio is unity, then the poles are A) Equal, positive and real B) Imaginary and complex conjugate C) Equal, negative and real D) None of the above

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asked Apr 9, 2018 by anonymous

The effect of corona in high voltage a.c. transmission line is ...

The effect of corona in high voltage a.c. transmission line is A) Increased energy loss in the transmission line B) Increased line reactance C) Increased line to line capacitance D) All of the above

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asked Apr 9, 2018 by anonymous

A bus coupler circuit breaker is utilized in a sub-station for...

A bus coupler circuit breaker is utilized in a sub-station for A) Connecting the transmission line with the bus-bar B) Connecting two power transformers in parallel C) Connecting the bus-bar with ground D) Connecting main and transfer buses in the sub-station

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asked Apr 9, 2018 by anonymous

Back-to back connection is used in HVDC system to ...

Back-to back connection is used in HVDC system to A) Provide synchronous tie between two systems B) Provide bulk power transmission over long distance C) Provide asynchronous tie between two systems D) Reduce the line voltage drop and the transmission loss

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asked Mar 10, 2018 by anonymous

What is meant by flash over voltage?

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What is dielectric breakdown strength?

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asked Mar 10, 2018 by anonymous

What is the difference between line and phase current?

Last answer: The currents flows through phase lines is called line voltage and currents flows from phase to neutral line is called phase current

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90 views 1 answer

Is 50hz or 60hz better?

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