ETO

Q. What is the meaning of power factor? Ans- Power factor is the cosine of the angle between voltage and current waveform. Q. How can it be improved? Ans- Power factor improvement capacitor banks are used if...

Vacuum switchgear follows the principle that it is virtually impossible for electrical current to flow in a vacuum. Therefore, the main contacts disconnected inside the vacuum bottle. The typical contact material consists of a tungsten matrix impregnated...

(a) Explain about BJT (Bipolar Junction Transistor),Uni-junction transistor. (b) Describe about NPN and PNP transistor with sketch. (c) Describe about Thyristor,GTO(gate turn off thyristor) (d) Describe about MOSFET operation, Snubber circuit. (a) BJT (Bipolar Junction Transistor) Three terminal device,...

A semiconductor is a type of material posses electrical conductivity between conductor and an insulator.They are neither good conductor nor good insulators. The electrical resistivity of semiconductor generally decreases strongly with increasing temperature.Semiconductor atoms...

A capacitor is a two terminal electrical component used to store electrical energy temporarily in an electric field. The types of practical capacitors vary widely, but all contain at least two electrical conductors (plates)...

A relay is an electromagnetic switch device which utilizes very small electric current that can turn on or off a much larger electric current. The heart of a relay is an electromagnet. A relay is...

A circuit breaker is an automatic device which is designed to stop the flow of current in an electrical circuit and save the electrical circuit from damage caused by overload or short circuit. Its main...

WHAT IS HIGH VOLTAGE: The International Electro technical Commission describe high voltage as above (>)1000 V for alternating current(AC), & at least 1500 V for direct current(DC) & differentiate it from low voltage (50–1000 V AC or 120–1500 V...

1. Alternator shows no voltage Causes: Exciter field resistance is too high or there is a loss of residual magnetism.Short-circuit in excitation circuit probably between leads to field or alternator slip rings.Insulation of windings is not proper.Fault in...

Conventions:- SOLAS – Came in force on 25th May 1980 MARPOL – Adopted in 1973, Protocol-78, Came in force from 2nd oct. 1983. STCW – Came in force from 28th April 1984. MLC – Adopted in 2006, Came...