# Recent questions tagged electric

Briefly describe the electric field of a static charge.

List three important characteristics of an electric circuit.

A) Watt B) Volts C) Farad D) Ampere

Options: A) WATT B) AMPERE C) VOLTS D) OHM

Electric power formula

Nodal Analysis of Electric Circuits Example

Describe the reason of using dc series motor for electric trains.

List four electric pressure transducer.

"Hydro electric power station are not perennial power station". Justify.

Explain starting system in diesel electric power plant.

Explain fuel system and air intake system in diesel electric power plant.

State any four advantages and four disadvantages of diesel electric power plant.

List out the four applications of diesel electric power plant.

List out any four effects of electric current used in measuring instruments & write name of meter working on it.

State various effects of electric current and explain any one.

Compare electric and magnetic circuit.

Draw a typical electric circuit including ammeter and voltmeter.

I am a new student of electrical and electronic engineering, and facing some problems on sign related, kvl as well as mesh current analysis. By getting solution of these problems, I may get rid of these problems. For figure 4, please just write the seven mesh equations only, solution is not needed.

The electric breakdown strength of insulating materials depends on  (A) Nature of applied voltage (B) lmperfection of dielectric material (C) Pressure, temperature and humidity (D) All or these

kWh meter is the electric meter that measures the amount of electrical _________ in kWh that was consumed in the house.  (A) Energy (B) Current (C) Voltage (D) None of the above

An _____________is a network of electrical components used to supply, transfer and use electric power:  (A) Electric power system (B) Electric power (C) All of the above (D) None of the above

The motor used for electric traction is  (1) D.C. shunt motor (3) D.C. series motor  (2) D.C. compound motor (4) Synchronous motor

In quadrilateral speed-time curve of electric traction system, the accelerations during successive time periods are ______ respectively.  (A) positive, negative and negative (B) positive, zero and negative (C) positive, positive and negative (D) positive, negative and zero

Identify the correct combination of respective Electric arc welding and Electric resistance welding methods :  (A) Butt welding and Seam welding  (B) Hydrogen shielding and Projection welding  (C) Seam welding and Coated electrode welding  (D) Coated electrode welding and Hydrogen shielding

Choose the correct order of electric discharge lamps in their increasing order of efficiencies (lumens/watt) :  (A) Sodium vapour lamp, Mercury vapour lamp, Neon lamp  (B) Neon lamp, Sodium vapour lamp, Mercury vapour lamp  (C) Neon lamp, Mercury vapour lamp, Sodium vapour lamp  (D) Mercury vapour lamp, Sodium vapour lamp, Neon lamp

The storage battery generally used in electric power stations is  (1) zinc carbon battery (2) lead acid battery (3) nickel cadmium battery (4) lithium -ion battery

The ability of materials to become polarized under an applied electric field is called _______ A) Ferroelectricity B) Paraelectricity C) Polectricity D) None of these

Which of the following is the name given to the lines of electric force which move so that its beginning traces a closed curve on a positive surface and its end traces a corresponding closed curve on the negative surface? A) Tube of surface B) Tube of lines C) Tube of force D) Tube of electricity

The electric field inside a hollow conducting sphere ________ A) Depends on the diameter of the sphere  B) Varies according to the direction of earth’s magnetic poles C) Is zero  D) None of these

Specific energy consumption of an electric train is the ratio between (A) Specific energy output at driving wheels and efficiency of the traction motor (B) Specific energy output at driving wheels and efficiency of the transmission gear (C) Specific energy output of driving motor and efficiency of the driving wheels (D) Specific energy output at driving wheels and efficiency of the (motor + transmission gear)

In electric traction for a trapezoidal speed-time curve, the time period is (A) free running speed period = constant speed period (B) free running period = coasting period (C) free running period + coasting period = constant speed period (D) average speed period = scheduled speed period

The terminal characteristics of a dc generator suitable for electric welders is (A) separately excited generator (B) shunt generator (C) series generator (D) differentially compounded generator

When electric current passes through a bucket full of water, lot of bubbling is observed. This suggests that the type of supply is?

When electric current passes through a metallic conductor, its temperature rises. This is due to?

Electric current passing through the circuit produces?

Heat in a conductor is produced on the passage of electric current due to?

The filament of an electric bulb is made of?

An instrument which detects electric current is known as?

Electric pressure is also called?

Power factor of electric bulb is?

Losses which occur in rotating electric machines and do not occur in transformers are?