Electrical Questions
Question Bank-1
40 Question
1)Who is the father of electrical engineering?
Ans: Michale Faraday
2) who was the first to draw a clear distinction between magnetism and static electricity??
Ans: William Gilbert
3) Electrical engineering became a profession in the later which century.??
Ans: 19 century
4) list the sub field of electrical engineering??
Ans:An Electrical engineering has now subdivided into a wide range of subfields including
- electronics,
- digital computers,
- computer engineering,
- power engineering,
- telecommunications,
- control systems,
- radio-frequency engineering,
- signal processing,
- instrumentation,
- microelectronics.
5)which dwvice that produced a static electric charge???.
Ans: electrophorus
6)who is the discoverer of electromagnetic induction???
Ans:Michael Faraday (in 1831)
7) who created the first working electric telegraph system???
Ans: Francis Ronalds (in 1816)
8) what is uses of resistor??
Ans:A In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.
Variable resistors can be used to adjust circuit elements (such as a volume control or a lamp dimmer), or as sensing devices for heat, light, humidity, force, or chemical activity.
Fixed resistors have resistances that only change slightly with temperature, time or operating voltage.
9)SI unit of resistance is???
Ans: ohm
10) Resistor are which type of elemeny??
Ans: passive
11) who is a investor of capacitor??
Ans:Ewald Georg von Kleist
12)A capacitor was historically first known as an ________????
Ans:electric condenser.
13) define the capacitance???
Ans:Capacitance is defined as a the ratio of the electric charge on each conductor to the potential difference between them.
14) The unit of aa capacitance in the International System of Units (SI) is the_____????
Ans: farad (F), defined as one coulomb per volt (1 C/V).
15) give a most any one use of capacitor??
Ans: A Capacitors are widely used in electronic circuits for blocking direct current while allowing alternating current to pass.
16)An inductor is which type of device??
Ans: passive
17)describe the Faraday's law of induction??
Ans:When the current flowing through an inductor changes, the time-varying magnetic field induces a voltage in the conductor,
18) what is an inductance???
Ans:which is the ratio of the voltage to the rate of change of current.
19) In the International System of Units (SI), the unit of inductance is _____????
Ans: henry(H)
20) uses of inductor???
- Ans:A Inductors are widely used in alternating current (AC) electronic equipment,
- particularly in radio equipment.
- block AC while allowing DC to pass; inductors designed for this purpose are called chokes.
- also used in electronic filters to separate signals of different frequencies,
- combination with capacitors to make tuned circuits, used to tune radio and TV receivers.
21) Give The three most important partical are in the atom??
Ans: the electron, the proton, and the neutron.
22) When electron are remove from the substance, that substance becomes ___(1)_____ charged and the substance acquiring electron from the other substance becomes a ___(2)____charged??
Ans:(1)positive(2)negative
23)who the first person to make careful quantitative measurments of the force between two charges. ???
Ans: Charles Coulomb
24)define the electric current??
Ans:The phenomenon of transferring charge from one point in a circuit to another point is described by the term, electric current, or
the time rate of net motion of electric charge across a cross-sectional of the conducting material.
25)what is the equation of current???
Ans: i=dq/dt
26) state the law of energy conversion??
Ans: The law of conservation of energy states that energy can neither be created nor destroyed. However its form can be converted.
27) write the type of energy conversion???
Ans:
>Electrochemical energy conversion
> Electromechanical energy conversion
Ans: The law of conservation of energy states that energy can neither be created nor destroyed. However its form can be converted.
27) write the type of energy conversion???
Ans:
>Electrochemical energy conversion
> Electromechanical energy conversion
>Magnetohydro dynamics(MHD) energy conversion
> Photovoltaic energy conversion
> Thermo-electric energy conversion
28) which devise generated electric energy from the mechanical energy of a hugh velocity ionised gas.???
Ans: Magnetohydro dynamics(MHD)
29)solar cell is a which type of energy conversion device??
Ans: Photovoltaic energy conversion
30)which two metal are generally use in Thermo-electric energy conversion??
Ans: copper and iro
31) superposition theorem applicable for ________ circuit????
Ans: linear element circuit
32) state the superposition theorem??
Ans: the responce in any element of a linear, bialateral network containing more than one independent sources can be obtained as the algebric sum of the responses obtained by each independent source acting separately at a time and with all other independent source set equal to zero
33)In a superposition theorem Ideal independent voltage source will be????
Ans: - short circuit
34) In superposition theorem Ideal independent current source will be????
Ans: - open circuit
35) controlled source are suppressed or not during analysis by super position????
Ans : not suppressed
36) what is the electrical gemerator??
Ans: An electrical gemerator is a machine which coverts mechanical energy(for power) into electrical energy (or power).
37) how many basic essential parts of an electrical generator ???
Ans : TWO
(1) a magnetic field and
(2) a conductor or conductors which can so move as to cut the flux.
38)give type of d.c. generator??
Ans:
- Separately Excited DC Generators
- Shunt Wound DC Generators
- Series Wound DC Generators
- Compound Wound DC Generators
39) Ward Leonard Systems of speed control is a example of ______ type of d.c. generator???
Ans:Separately Excited DC Generator
40) which type of d.c. generator are use as a booster???
Ans: Series Wound DC Generator
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