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0 answers 45 views

The following circuit has following parameters. Ac=Ag=9cm2 g=30cm N=500 Meur=70000 Find the Inductance of the coil

asked 2 days ago in Electrical Engineering
2 answers 27 views

Three lamps are connected in parallel across a 120 Volt source. If one lamp burns out, the remaining two will be: A. Glow dimmer B. Glow brighter C. Not light D. Glow with the same brightness as before

answered 2 days ago in Electrical Engineering
1 answer 60 views

The measurement of dielectric loss and power factor is done using  (A) Weins Bridge (B) Hays Bridge (C) Schering Bridge (D) Wheat Stone Bridge 

answered 3 days ago in Electrical Engineering
2 answers 55 views

An Auto-transformer (which has only one winding) may be used as a ______ .  (A) Both Step-Up and Step-Down transformer (B) Step-Down Transformer (C) Step-Up Transformer (D) None of these

answered 6 days ago in Electrical Engineering
3 answers 137 views

Three resistors of 4 Ω, 6 Ω and 9 Ω are connected in parallel. Which resistor consumes the maximum power?  (A) 4 Ω (B) 6 Ω (C) 9 Ω (D) 17 Ω

answered Jul 11 in Electrical Engineering
1 answer 45 views

Two's complement of -8 is  (A) 1000 (B) 1010 (C) 110 (D) 1110

answered Jul 7 in Electrical Engineering
1 answer 8 views

The cycle time of a PLC is the time it takes to   (a) read all the input signals. (b) read all the input signals, run the program and update outputs. (c) read an input signal. (d) check all the input signals against the program.  

answered Jul 5 in Electrical Engineering
1 answer 20 views

Mho relay is   (a) current restrained current relay. (b) voltage restrained directional relay. (c) current restrained directional relay. (d) voltage restrained current relay. 

answered Jul 4 in Electrical Engineering
2 answers 31 views

What happens to the resistance of a wire when its length as well as the cross-sectional area are doubled? A) It doubles B) It becomes 4 times C) It becomes 2π times D) It remains the same

answered Jun 25 in Electrical Engineering
1 answer 25 views

What is the flow of electrons from one atom to another called?

answered May 21 in Electrical Engineering
1 answer 321 views
2 answers 20 views
2 answers 25 views
2 answers 36 views
2 answers 38 views

Pure inductive circuit takes power from the A.C. line when?

answered May 15 in Electrical Engineering
1 answer 51 views

The voltage phasor of a circuit is 10 ∠15° V and the current phasor is 2∠–45° A. The active and reactive powers in the circuit are   (a) 20 2 W and 10 2 VAR (b) 10 W and 10 3 VAR (c) 5 W and 5 3 VAR (d) 10 3 W and – 10 VAR 

answered Apr 29 in Electrical Engineering
2 answers 62 views
2 answers 106 views

If a positively charged body is placed inside a spherical hollow conductor, what will be the polarity of charge inside and outside the hollow conductor ? (a) Inside positive, outside negative (b) Inside negative, outside positive (c) Both negative (d) Both positive

answered Feb 7 in Electrical Engineering
5 answers 608 views
2 answers 201 views

why the electrical appliances are connected in parallel ?

answered Jan 20 in Electrical Engineering
4 answers 412 views
6 answers 245 views
1 answer 62 views

What type of excitation is given to the rotor winding of a synchronous motor?  (A) DC supply at 100 -250 V (B) AC supply at 400 V (C) Revolving field (D) Induction from stator currents 

answered Dec 21, 2018 in Electrical Engineering
1 answer 118 views

A 60 Hz, 4 pole turbo generator rated 100 MVA, 13.8 KV has an inertia constant of 10 MJ/MVA. Find the stored energy in the rotor at synchronous speed.  (A) 10 MJ (B) 100 J (C) 1000 J (D) 1000 MJ 

answered Dec 8, 2018 in Electrical Engineering
1 answer 117 views

The maximum demand of consumer is 2 kW and his daily energy consumption is 20 units. Its Load Factor is (1) 10.15% (2) 41.6 % (3) 50 % (4) 60% 

answered Nov 19, 2018 in Electrical Engineering
2 answers 73 views

A heater takes 4 Amp at 250 volts. How much power does it consume? A. 1 KWatt B. 2 KWatt C. 3 KWatt D. 4 KWatt 

answered Nov 15, 2018 in Electrical Engineering
1 answer 60 views

A network has 10 nodes and 17 branches. The number of independent mesh equations required to solve the network is   (a) 7 (b) 8 (c) 10 (d) 45 

answered Nov 8, 2018 in Electrical Engineering
1 answer 31 views

Horizontal axis and vertical axis are the types of   (a) Nuclear Reactor (b) Wind Mills (c) Bio Gas Reactor (d) Solar Cell 

answered Oct 21, 2018 in Electrical Engineering
2 answers 316 views

What does Fleming's left hand rule state?

answered Sep 14, 2018 in Electrical Engineering
19 answers 99 views

Moving iron instruments can be used for measuring (1) Direct currents and voltages (2) Radio frequency currents (3) A.C currents and voltages (4) Both (a) and (c)

answered Sep 1, 2018 in Electrical Engineering
2 answers 47 views

The core of a transformer (medium size) uses to provide high flux densities (a) diamagnetic (c) ferromagnetic core (b) paramagnetic (d) none of these

answered Sep 1, 2018 in Electrical Engineering
2 answers 85 views

What is Data Acquisition System (DAS) ?

answered Aug 28, 2018 in Electrical Engineering
2 answers 91 views

what is variable frequency drive ?

answered Aug 28, 2018 in Electrical Engineering
2 answers 238 views

The equation of 50 Hz current sine wave having r.m.s. value of 60 A is?

answered Aug 27, 2018 in Electrical Engineering
2 answers 49 views

The r.m.s. value of pure cosine function is?

answered Aug 27, 2018 in Electrical Engineering
2 answers 53 views

Do cell phones use AC or DC current?

answered Aug 25, 2018 in Electrical Engineering
3 answers 67 views

Why do we use AC current in our homes?

answered Aug 25, 2018 in Electrical Engineering
1 answer 33 views

What is the direction of the flow of electrons?

answered Aug 15, 2018 in Electrical Engineering
1 answer 59 views

What is the direction of flow of electric current in an electric circuit?

answered Aug 15, 2018 in Electrical Engineering
0 answers 66 views

Write short notes on 3 phase AC system.

asked Aug 11, 2018 in Electrical Engineering
1 answer 123 views

A 50Ω transmission line is terminated in an impedance of 20-j50. What will be the reflection coefficient? A) 0.69 B) 1.69 C) 6.9 D) 16.9 

asked Jun 18, 2018 in Electrical Engineering
1 answer 75 views

What is the value of susceptibility in case of vacuum? A) 1 B) 0.5 C) ∞ D) 0 

asked Jun 18, 2018 in Electrical Engineering
1 answer 67 views

The magnetic susceptibility of paramagnetic material is: A) Less than zero B) Less than one but positive C) Greater than one D) Equal to zero

asked Jun 18, 2018 in Electrical Engineering
1 answer 93 views

Which of the following is NOT a non-linear resistor? A) Varistor B) Precision resistor C) NTC thermistor D) PTC thermistor 

asked Jun 18, 2018 in Electrical Engineering
1 answer 72 views

 A resistor in which the resistance changes exponentially with change in temperature is called as A) Potentiometer B) Phototransistor C) Varactor D) Thermistor 

asked Jun 18, 2018 in Electrical Engineering
1 answer 75 views

The colour band on the extreme left in general purpose fixed resistors represents: A) Tolerance B) First significant digit C) Wattage Rating D) Voltage Rating

asked Jun 18, 2018 in Electrical Engineering
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