🔍

Recent questions and answers in Electrical Engineering

Equivalent π model is quite suitable for analyzing the performance of transmission line of  A) 50 km length B) 150 km length C) 250 km length D) All of the above lengths
Last Answer : 150km because nominal π and T method are used in medium transmission lines . and these lines ranges from 80-240 km...

Show More

If a 220 V heater is used on 110 V supply, the heat produced by it will be nearly (a) one half (b) twice (c) one-fourth (d) four times 
Last Answer : 1/4...

Show More

Varley loop tests are preferred over Murray loop tests because  (1) Valley loop test can locate open circuit fault (2) Varley loop test gives higher accuracy (3) in Varley loop test provision is made for ... of obtaining it from the relation R = pl/a (4) Valley loop test can locate the earth fault
Last Answer : Option 3...

Show More

A 1mA D' Arsonval movement has resistance of 100 Ω. It is to be converted to a 10 V voltmeter. The value of multiplier resistance is  (A) 999 Ω (B) 9999 Ω (C) 9900 Ω (D) 990 Ω 
Last Answer : C) Rs = (10/1x10^-3) - 100 Rs = 9900...

Show More

Minimum distance of underground cable from the foundation of building should be   (a) 100 cm (b) 50 cm (c) 10 cm (d) 5 cm 
Last Answer : A...

Show More

Define reluctance and give its unit.
Last Answer : Reluctance is the resistance offered the material to the passage of magnetic flux through it and corresponds to resistance in the electric circuit it is denoted by (s) And it's unit is amper per weber (A/Wb)...

Show More

In a CRO, the quantity to be measured is applied across  (1) focusing electrodes (2) cathode (3) Y-plates (4) X-plates
Last Answer : C...

Show More

A. active power B. reactive power C. apparent power D. A & C E. B & C
Last Answer : D...

Show More

CRO is used to measure ________. A. Amplitude B. Phase difference C. Frequency D. All of these 
Last Answer : D...

Show More

Short-circuit kVA is obtained by multiplying the base kVA by (1) 10% X (2) 20% X (3) 50% X (4) 100% X
Last Answer : 100%...

Show More

Consider the following statements : If a high Q parallel resonant circuit is loaded with a resistance  1. The circuit impedance reduces.  2. The resonant frequency remains the same.  3. The bandwidth reduces.  Which of the above statements is/are correct ?
Last Answer : 1...

Show More

The voltage of a circuit is measured by a voltmeter having input impedance comparable with the output impedance of the circuit thereby causing error in voltage measurement. This error may be called as_________.
Last Answer : error caused by misuse of instrument...

Show More

Define Electrolyte. Write its types. 
Last Answer : A substance that dissociates into ions in solution and acquires the capacity to conduct electricity. Sodium, potassium, chloride, calcium, and phosphate are examples of electrolytes, informally known as lytes....

Show More

Arc welding uses following electric supply (A) ac (B) dc (C) both ac and dc (D) spiral waveform 
Last Answer : both ac and dc...

Show More

Which of the following is true with an auto transformer? A) It has only one winding  B) It has two separate windings namely primary winding and secondary winding C) It has two primary windings and one single secondary winding D) None of these
Last Answer : A it has only one winding....

Show More

A megger is basically a/an   (a) Moving iron type instrument (b) Moving coil type instrument (c) Hot wire instrument (d) Electrolytic instrument
Last Answer : Moving coil type instrument...

Show More

A megger is to measure insulation resistance of a cable. The cable should be connected to   (a) Battery (b) DC supply (c) AC supply (d) No supply  
Last Answer : majorly in DC as well as AC......but ans is Battery...

Show More
To see more, click for all the questions in this category.
Welcome to Ask Public, where you can ask questions and receive answers from other members of the community.

997k questions

994k answers

1.2k comments

10.2k users

...