Is 50hz or 60hz better?

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Answer : Because India uses 220-230volt  In USA there they uses 110volt

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Description : Do you think the general population is better off or worse off than it was fifty years ago? Why?

Description : Which is better: your short-term or your long term memory?

Description : The higher the price, the better the quality, or how not to waste your money

Answer : The higher the price, the better the quality, or how not to waste your money A headache for every homeowner is the need to protect him from bad weather and intruders. You can, of course, take ... is obliged to give a guarantee for its products, which may slightly increase the value of the goods.

Description : Which is better, brick or foam block?

Answer : Which is better, brick or foam block? Ideal materials for construction, or at least having an undoubted advantage over others, have not yet been invented. Both the brick and the foam ... risk of getting low-quality building material can be attributed to the general disadvantage of foam blocks.

Description : Far better it is to dare mighty things, to win glorious triumphs, though checkered with failure, than to take rank with those poor souls, who neither enjoy much or suffer much, because they live in the gray twilight that knows neither victory nor defeat. famous quote

Description : A 'No' uttered from deepest conviction is better and greater than a 'Yes' merely uttered to please, or what is worse, to avoid trouble. - Mahatma Gandhi quote

Description : "Often the difference between a successful man and a failure is not one's better abilities or ideas, but the courage that one has to bet on his ideas, to take a calculated risk and to act." - Maxwell Maltz

Description : For better interaction with the students, the teachers objective should be the Options: A) Equitable Distribution Of Response Time B) Proximity C) Affirm Or Correct Student Performance D) All Of These

Answer : D) All Of These

Description : You are being pressurized by your colleagues to take the membership of the teacher's union. How could you take decision in this situation? Options: A) You will give priority to social relations, ... enmity with the management D) You will try best to go against their will by hook or crook

Answer : B) You will have faith in unity so you accept the membership 

Description : According to the Better Business Bureau, if you fail to advertise the highest price in a range of prices for a service or product as prominently as that of the lowest, it violates the New York ... prominently the highest price in a range of prices for a service or products as that of the lowest 

Description : 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

Answer : makes the monetary policies less effective

Description : Which field is better engineering or medical ?

Answer : I would say there is no better field than another. Both fields are kind of complementary in a way that engineering provides necessary materials to the medical field while the medical field provides hands to cure

Description : What is better computer engineering or software engineering?

Answer : Computer Engineering have many parts in which one is software engineering, if your interest in software development then choose software engineering

Description : Which is better Arduino or Raspberry Pi?

Answer : LED is better than LCD. LED have lots of advantages and LED have long span .

Description : 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 

Answer : For RC series circuit

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

Description : A3-phase, 5.5kW, 440V, 50Hz, cylindrical rotor S.M has synchronous reactance of (0+j2) Ω/phase. When it is delivering its rated output the motor efficiency is 85% and load angle is 20º. Find the excitation voltage, armature current and the power factor

Description : 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 

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

Description : 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:

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

Description : A 3-phase, 4-pole, 50Hz induction motor runs at a speed of 1440 rpm. The rotating field produced by the rotor rotates at a speed of ________ rpm with respect to stator field. (A) 1500 (B) 0 (C) 1440 (D) 60

Answer : 0

Description : An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW. Its rotor input is (A) 5.06 kW (B) 0.3 kW (C) 100 kW (D) 83.33 kW

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

Description : 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

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

Description : The breakeven distance for HVDC transmission is (A) 100 kM (B) 250 kM (C) 500 kM – 800 kM (D) Above 1000 kM 

Description : 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.

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.

Description : 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

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

Description : 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

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

Description : 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

Description : 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 

Description : 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

Description : When the communication line run parallel to the power lines in close proximity  P. The electromagnetic effect produces current due to induction resulting its superposition on the speech signal of the communication line causing distortion  Q. The ... ) R only B) P, Q & R C) P & Q only D) P & R only

Description : Due to skin effect  A) Portion of conductor near the outer surface carries less current and the inner core of the conductor carries more current B) Portion of conductor near the outer surface ... Current density near the center of the conductor is maximum and near the surface of the conductor zero

Description : 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

Description : What are the losses in a transmission line?

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Description : What is meant by flash over voltage?

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Description : How do you calculate power loss?

Description : What is the difference between line and phase current?

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

Description : What is the lowest acceptable insulation resistance for a cable?

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Description : What do you mean by insulation coordination?

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