EE6504 Electrical Machines II important questions for Nov/Dec 2015

Here we have  provided EE6504 Electrical Machines II important questions for the upcoming university exam Nov/Dec 2015.students can download and make use of it.
Regulation 2013, EEE  5th semester EE6504 EM 2  part-A and important question for NOV/DEC 2015 exam are provided below.

EE6504 EM II Important questions for Nov/Dec 2015

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EE6352 ELECTRICAL ENGINEERING AND INSTRUMENTATION IMPORTANT QUESTIONS NOV/DEC 2015

Here we have  provided EE6352 Electrical engineering and instrumentation important questions for the upcoming university exam Nov/Dec 2015.students can download and make use of it.
Regulation 2013, ECE 3rd semester EE6352 EEI  part-A and important question for NOV/DEC 2015 exam are provided below.

EE6352 EE&I-Important questions for Nov/Dec-2015

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ZENER DIODE

ZENER DIODE

·         A Zener diode is a specially doped PN junction device to operate in reverse breakdown region.

Equivalent circuit of zener diode

Biasing of zener diode:

         Forward biasing                                                                                

Reverse biasing:

                                       

• In forward biased condition the normal pn junction diode and zener diode operate in similar fashion.
• In reverse biased condition, the zener diode carries reverse saturation current till the reverse voltage applied is less than the reverse break down voltage(V<V_z). When reverse voltage exceeds reverse breakdown voltage(V>V_z), the current through it changes drastically but voltage across it remains constant.such a breakdown region is called normal operating region of a zener diode.
• The reverse voltage at which the breakdown occurs is called zener breakdown voltage(V_z).

VI characteristics of a Zener diode

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Flipflops

FLIP FLOPS

·         A flip flop is a sequential loic device used to store one bit information. It is also called as bi-stable device since it has two possible states: 1 (high) and 0 (low).

Types of flip flops:

1.       RS flip flop.

2.       Clocked RS flip flop.

3.       D flip flop

4.       J-K flip flop.

5.       T flip flop.

RS flip flop:

·         RS flip flop has two inputs labelled S and R. The two outputs are labelled Q and Q. In flip flops the outputs are always complementary. In other words, if output Q =1, then output Q=0, and so on. The letters R and S are often referred as set and reset inputs.

                                                

  Truth table

S	R	Q(n+1)	Comments
0	0	Qn	No change
0	1	0	Reset
1	0	1	Set
1	1	x	Not allowed

·        

A  high S (S=1) and low R (R=0) results in the set state (Q=1).

·         A low S (S=0) and high R (R=1) results in the reset state (Q=0).

·         When both inputs are low (S=0, R=0), results in no change in output(Q= lastvalue).

·         When both inputs are high (S=1, R=1), results in indeterminate state and this is known as race condition.

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Number systems

Number systems

1.       Decimal number system

2.       Binary number system

3.       Octal number system

4.       Hexa decimal number system

Decimal number system:

·         There are 10 characters namely 0,1,2,3,4,5,6,7,8,9 and the base is 10.

·         Example:  (i)(0.7)₁₀    (ii) (24)₁₀

Binary number system:

·         There are 2 characters namely 0 and 1, and the base is 2.

·         Example:  (i) 1100₂  (ii) 110.11₂

Octal number system:

·         There are 8 characters namely 0,1,2,3,4,5,6,7 and the base is 8.

·         Example: (i) 236₈  (ii) 566₈

Hexadecimal number system:

·         There are16 characters, namely 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F and the base is 16.

·         Example: B86₁₆  (ii) 1A2.8₁₆

Relation among different number systems

Decimal	Binary	Octal	Hexadecimal
0	0000	00	0
1	0001	01	1
2	0010	02	2
3	0011	03	3
4	0100	04	4
5	0101	05	5
6	0110	06	6
7	0111	07	7
8	1000	10	8
9	1001	11	9
10	1010	12	A
11	1011	13	B
12	1100	14	C
13	1101	15	D
14	1110	16	E
15	1111	17	F

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Full adder

Full adder:

·         A full adder has three inputs and two outputs. It can add 3digits at a time. The two inputs are A and B and third input is C_in from the carry generated by the previous addition. It produces two outputs, SUM and CARRY.

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How to lose weight ?

How to lose weight: -

 Turn your head to
the left, 

and -

 then turn it to the right.

Repeat this exercise whenever offered food.

sorry, just kidding.

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Half adder

Half adder 

Half adder:

·         Half adder has two inputs and two outputs. It can add 2 bits at a time and produce 2-bit data(SUM and CARRY). It circuit consists of an EX-OR gate and AND gate.

·         The outputs of EX-OR gate is called the SUM(S), while the output of AND gate is known as CARRY(C).

·         This circuit is called half adder because it cannot accept a CARRY from the previous additions. Hence half adder circuit can be used for binary addition of lower most bit only.

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