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Transfer of electric power from primary to secondary in a transformer takes place A electrically B magnetically C electro-magnetically D conductively
2 7926Resistance of low voltage side of transformer compared to high voltage side is A less B equal C more D depens on design
1 5694As load in a transformer increases, mutual flux linkage in core= A increases B decreases C not change D first increase then decrease
2 8368Are we do it in single transformer with dual primary as 11 KV and 33 KV and constant output as 415 Volts?.
1 3209In 3 phase induction motor even with low Voltage it reaches nearly it's rated speed why? (for example instead of 400V it reaches with 250V)
2 472077 In constant power region of 3-phase IM torque-speed characteristics, the torque is proportional to A speed B slip C 1/speed D 1/slip
1 2762In constant power region of 3-phase IM torque-speed characteristics, if frequency increases slip A does not alter B decreases C increases D none of above
2054In constant power region of 3-phase IM torque-speed characteristics, if frequency increases flux A does not alter B decreases C increases D none of above
2247In constant power region of 3-phase IM torque-speed characteristics, if frequency increases voltage A does not alter B decreases C increases D none of above
1 2775Stator of 3-phase IM has 3 slots per pole per phase. If supply frequency is 50 Hz, calculate the speed of rotating stator flux A 1000 rpm B 500 rpm C 1500 rpm D 1440 rpm
2185Stator of 3-phase IM has 3 slots per pole per phase, calculate number of stator pole pairs. A 1 B 6 C 2 D 3
2 4572A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3
2020Post New Electrical Engineering Questions
WHAT ARE THE DATAS REQUIRED FOR PROTECTION AND METERING AND CONTROL AND LOGIC PREPARATION,HOW TO STUDY THE PROTECTION AND METERING?
what is difference between speed mode and torque mode in motor?? explain in simple words please.
need to make a report. Need to choose a 3phase induction motor. Load conditions motor will operate in : Maximum Load: 30 Kw Speed: 2950 rpm Ambient temp: 20 cent Supply voltage: 440V Frequency: 50Hz need to look for the safety factor when choosing the motor, went through catalouge found a few, but dont know how to choose the safety factor allowing an extra load something above 30 KW to avoid any harm.
what is the pulse and audio frequency transformer? what is different between induction regulators and tap changing transformer?
what is mean by ideal infinite bus? why it is required to consider in fault short circuit calculations?
for hipot test on 33kV busbar, we will test on 70 kV or 56kV, what is the acceptable leackage current?
How to protect a Dosing pumps/any sensitive equipment (single phase) from surge protection inside a food factory.
Metal covered multiconductor cables shall employ a marker tape located within the cable running for its complete length in lieu of cable surface marking. Is it true or false?
How to convert 2 phase to 3 phase electricpower in induction moter?
use of PIR in ehv breaker
derive DC RMS value for half wave rectifier?
hello friends..... any one have papers or any study materials?sail ,hpcl...?
how the characterstics of control valve being done
How much costly in percentage wise is sandwich busduct costly than air insulated busduct of any rating?
What is meant by Im=30mA@Vk/2. How to know the kee point voltage for CT design
