Skip to main content

Basic MCQ's of EEE-I



1.What is the unit of electrical charge?
1.watt
2. joule
3. volt 
4. coulomb  
Answer: 4
Explanation:
unit of
Charge -> Coulomb, Energy ->Joule, Voltage -> Volts, Power -> Watts

2.The minimum resistance value for a blue, gray, red, silver resistor is
1. 612 
2. 6,120
3. 6,800 
4. 6,460 
Answer: 2
Explanation: blue-6 grey-8 red-2 so value is 6800ohms tolerance +-10% therefore minimum resistance value is 6800/100*10=680
6800-680=6120

3.If the current changes from 4A to 5A in 1s with the emf 10V. then what will be the value of inductance?
 1.10H 
2. 20H 
3. 30H 
4. 40H 
Answer: 1 
Explanation: As emf=L(i2-i1)/t by substituting i2=4A, i1=5A, emf=10V,we get L=10H

4. What happens when many resistors are connected in series?
1. Divides the voltage proportionally
2. Divides the current propotionally
3. Increase the source voltage
4. Decrease the power to zero
Answer: 1

5. Consider a circuit consists of 22 ohm resistor carrying 2 A of current then what will be the voltage across the resistance?
1. 56V
2. 15V
3. 44V 
4. 25V
Answer: 3
Explanation:
As V=IR, I = 2A, R= 22 ohm, then V= 22 x 2= 44 V

6.The two resistors are said to be connected in series when
1. Same current flows through it
2. same voltage flows through it
3. Total current divides across it
4. Voltage remains constant across them
Answer: 1

7. If the resistance of the series circuit is doubled then what will happen to the current flows through it?
1. Becomes double of its original value
2. Remains same
3. Becomes infinity
4. Becomes half of its original value
Answer: 4
Explanation:
As V=I/R,if R becomes 2R, then V = 1/2 R

8. A three terminal variable resistor is known as 
1. thermistor
2. Varistor
3. Potentiometer
4. Voltmeter
Answer: 3
Explanation: 
Potentiometer is a three-terminal resistor with a sliding contact that forms an adjustable voltage divider, current divider or other devices

9.If 10A current flows through the lamp filament then how much charge will flow through it in 1.25s?
1.10.5 C
2. 20 C
3.15.2 C
4.12.5 C
Answer: 4
Explanation:
As i = q/t , by substituting i = 10 A , t = 1.25s, then q= i x t, where q = 10 x 1.25= 12.5 C

 10.If the current in the circuit should not exceed 20 A, then what will the best value of fuse to be used?
1. 24 A
2. 10 A
3. 20 A
4. 15 A
Answer: 3
Explanation: 
The fuse in a circuit should be equal to the rate amp

Comments

Post a Comment

Popular posts from this blog

EEE Interview Questions IV

1. What is Power System? It is a branch of electrical engineering which deals with the study of generation, transmission, distribution and utilization of electrical energy 2. What is Power Factor? The cosine of angle between voltage and the current in an AC circuit is known as power factor 3. How should be power factor for the good working system? Power Factor should be less than 1 for the good working system 4. What is one line diagram? One line diagram is a single line representation of  three phase power system It consists of symbol representation of  bus bar, Generator, Alternator, e.t.c [caption id="attachment_91" align="alignnone" width="624"]                                                                one line diagram 5. W...
Post a Comment
Read more

EEE Interview Questions-1

Here are some of the basic questions asked in interviews for EEE students 1. what is the principle of motor?       The electric motor is based on the principle that whenever a current carrying conductor is placed in an magnetic field it experiences a mechanical force i.e turning or twisting movement is called as torque. 2. what is the principle of generator?   The electric generator is based on the principle of faraday's law of electromagnetic induction. Such that whenever a current carrying conductor is placed in an varying magnetic field it induces an emf in it. 3. what are the types of DC motor? Series motor Shunt motor Compound motor Permanent magnet DC motor 4. What are the types of AC motor? Synchronous motor Asynchronous motor 5. What is Synchronous motor?       Synchronous motor is a kind of AC motor where the rotation of the shaft is synchronized with the frequency of the supply current at steady ...
Post a Comment
Read more

Synchronous Condensor

Synchronous Condensor: In electrical engineering, it is considered as a borderline between a motor and generator with no mechanical load  In other words, it is a DC excited synchronous motor whose shaft is connected to nothing It can compensate either lagging or leading power factor by supplying or absorbing reactive power from the line It is also called as synchronous Condensor or synchronous compensator Working: Kinetic energy stored in motor of machine will help to stable a power system during rapid fluctuations of load  It involves three conditions based on power factor: Under Excitation   Unity or Ideal  Over Excitation  Under excitation: In under excited condition, the machine will operate at lagging power factor  It draws lagging current from the supply line  Lagging power factor can be corrected by supplying reactive power   Reactive power drawn from capacitor bank decreases when grid Voltage decrea...
Post a Comment
Read more