Maharashtra State Board of Technical Education 2011-3rd Sem Diploma Electrical Engineering (DEE) for in Electrical Engineering GroupSubject :- -Electrical Circuits and Networks(12055) - Que
MSBTE ques. paper for Diploma in Electrical Engineering Group
Third Semester
Subject :- -Electrical Circuits and Networks(12055)
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12055
3 Hours/100 Marks Seat No
Instructions : (1) AU questions are compulsory.
(2) Answer each next main question on a new page.
(3) Illustrate your answers with neat sketches wherever necessary.
(4) Figures to the right indicate full marks.
(5) Assume suitable data, if necessary.
(6) Use of Non-programmable Electronic Pocket Calculator is permissible.
(7) Mobile Phone, Pager and any other Electronic Cortmuracation devices are not permissible in Examination Hall.
(8) Preferably write the answers in sequential order.
Marks
1. Attempt any ten of the following : 20
a) Define the term resistance and state its unit.
b) Define time period of A.C. waveform.
c) In pure capacitive circuit current_voltage_by degrees.
d) Write the equation for resonant frequency of series circuit.
e) What is meant by Q-factorof R-L-C series circuit ?
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Marks
f) What are the different powers that exists in AX', circuits ?
g) Define Bilateral Network.
h) What is meant by constant voltage source ?
i) State maximum power transfer theorem applicable to D.C. circuits, j) If A = 3 + j4; B = 5 + j7 and C = 4 - j6 then calculate (A + B)/C
k) What is meant by balanced 3 phase load ?
1) State Thevenins theorem.
2. Attempt any four of the following : 16
a) Explain the response of pure inductance to alternating supply with neat waveform and vector diag.
b) Define cycle, amplitude, instantaneous value and frequency of AX', quantity with neat diagram.
c) Calculate admittance of impedance z = 6 + j8, also find susceptance and conductance with its unit.
Marks
d) Using mesh analysis calculate current through each branch in Circuit
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Circuit 1
e) What is meant by polyphase system ? State any six advantages of polyphase system over single phase system.
f) Find current through 2Q resistance branch in the Ckt.2 using source transformation technique.
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('ircuit 2 |
3. Attempt any four of the following :
a) If Zj = 4 + j6 and = 10 j 15 are connected in parallel find the equivalent impedance of the combination.
16
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Attachment:
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| Earning: Approval pending. |
