physics group-iii to iv - shivaji university schedule... · carey foster's bridge ... select...

SHIVAJI UNIVERSITY, KOLHAPUR

Physics (New Course)

Candidates Seat No. GROUP III

1. Transistor Series Voltage Regulator

With a given rectifier, prepare a regulated power supply, by using transistor. Vary output cur-rents by changing load resistance. Hence measure output voltages for different output currents. Plotgraph of output voltage against output current. From graph determine percentage load regulation.for RL=................................. Ω

Scheme of Marking :

1 Circuit Diagram 4

2 Connections 3

3 Observations 6

4 Graph,Calculations and results 5

5 Oral 3

Total : 21

Signature of the examiner.

Sr.No. Different heads for distribution of marks

AllottedMarks

Marksobtained

byCandidate

Remarksif any

% load regulation =Vo - VL

VL

x 100

where, Vo = open circuit voltage

VL = Output voltage corrresponding to rated (designed) Load Current

B. Sc. Part-II : Practical Examination, March/April 2016




2. Colpitt's Oscillator

(using transistor)

Draw the neat circuit diagram of Colpitt's Oscillator.

Assemble the circuit and measure the frequency of oscillator on C. R. O. Verify your result by using

Scheme of Marking :

1 Circuit Diagram 6

2 Connections 6

3 Observations and result 6

4 Oral 3

Total : 21



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f =1

2 π √LC

Where C =C1. C2

C1 + C2

given C1 = C2 =..................FL =...........................H.





3. Phase Shift Oscillator

Draw the neat circuit diagram of phase shift Oscillator.Assemble the circuit and measure the frequency of oscillator on C. R. O.

Verify your result by using the formula f =

Given : R=................ Ω & C =...............F

Scheme of Marking : Given :

1 Circuit Diagram 6

2 Connections 6

3 Observations and result 6

4 Oral 3

Total : 21



AllottedMarks

Marksobtained

byCandidate

Remarksif any

1

2 π RC √6





4. Logic Gates(using 74 series)

Draw the necessary diagrams & verify the truth tables of NAND, NOR, Ex-OR, Ex-NOR gates

Note : Pin connections of given IC'S are provided.

Scheme of Marking :

1 Diagrams 4

2 Connections 7

3 Observations : Verification of truth table 6

4 Oral 4

Total : 21



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5. de Morgan's Theorem(using 74 series)

Note : Pin Connections of given ICs are provided

Scheme of Marking :

1 Diagrams 4

2 Connections 7

3 Observations : Verification of truth table 6

4 Oral 4

Total : 21



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Draw the necessary diagrams and Verify de Moragan's theorems using 74 series.




6. Cathode Ray Oscilloscope

ii) Connect the frequency generator to the Y input of C. R. O. Hence determine the frequencyof the A. C. voltage. Repeat the experiment for another unknown frequency.

Scheme of Marking :

1 Circuit diagrams 6

2 Connections 5

3 Observations 5

4 Result with unit 2

5 Oral 3

Total : 21



AllottedMarks

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byCandidate

Remarksif any

B. Sc. Part-II : Practical Examination, March/April2016

i) Determine A. C. OR D. C. sensitivity of Y plate of given C. R. O.



Candidates Seat No. GROUP IV

1. Constants of a Ballistic Galvonometer

Determine the following constants of a ballistic galvonometer.

1) Figure of Merit (K)

2) Current Sensitivity (Si) =

v)

where symbols have their usual meaning

Plot the graph of P (y-axis) against θ (x-axis). Use slope to calculate K.

N. B. : 1. Get your diagram checked

2. Get your connections checked before passing the current.

Scheme of Marking :

1 Circuit Diagram 3

2 Connections 3

3 Observations 6

4 Calculation Graph and results 6

5 Oral 3

Total : 21



AllottedMarks

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= ____________ . __ . ___ × 10 6

1K

1KG

E(P+Q) . (R+G)

Pθ

D100


[Given : Resistance of B. G. (G) = - - - - - ohms]

3) Voltage Sensitivity (S




2. Comparison of Capacities (De-Sauty's Method)

Determine the ratios of the capacities, CA : CB and CA : CC of the condensers A, B and C.

CA B and CC.

N. B. : 1. Draw the circuit diagram and get it checked.

2. Get your connections checked before connecting the source of e.m.f.

Scheme of Marking :

1 Circuit diagram and connections 5

2 Procedure 5

3 Tabular form, observation 4

4 Graph, calculations and results 4

5 Oral 3

Total : 21



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= ........................µF . Find C




3. Mutual Inductance

Use the formula M = X slope X θ1.

where T = Periodic time of B. G.

r = Small resistance across which the galvanometer and secondary coil are connected;

Φ = Steady deflection;

θ1 = Initial throw ; θ3 = next throw on the same side as θ1.



Scheme of Marking :


2 Procedure 5

3 Tabular form, observation 4

4 Graph, calculations and result 5

5 Oral 3

Total : 21



AllottedMarks

Marksobtained

byCandidate

Remarksif any

T

2π ( )θ1

θ3

¼


Determine the mutual inductance for air core/iron core transfomer using a ballistic galvanometer.

Plot a graph of r (y-axis) against Φ, (x-axis) and measure the slope of the graph.




Determine the resistance per unit length of the given bridge wire.


2. Get your connections checked before passing the Current.

Scheme of Marking :

1 Circuit diagram and Connections 5

2 Procedure 5

3 Tabular form, observations 4

4 Calculations and results 4

5 Oral 3

Total : 21



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4. Carey Foster's Bridge

Replace the resistance box in one of the gaps of the Carey Foster's key by an unknown lowresistance (X) and hence determine its value. Similarly determine the value of another lowresistance (Y)




5. Calibration of Bridge wire by Griffith's method

Calibrate the given bridge wire by Griffith's method. Cover the entire length of the wire insuccession by taking a segment (about 7 cm.) of wire. Plot the calibration curve and interprete thecurve.


2. Get your connections checked before passing the Current.

Scheme of Marking :

1 Circuit diagram and Connections 6

2 Procedure 5

3 Tabular form, with observations 4

4 Graph and interpretation 3

5 Oral 3

Total : 21



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6. Wien's Bridge

Determine the frequency of the given oscillator (Source) by Wien's bridge method using reso-nance condition.

___ = ___

Where, Z1 = impedance of branch C1 & R1 in parallel.

Z2 = impedance of branch C2 & R2 in series

Keep R4 = 2 R3 ; C1 = C2 = C =................ (given)

Select R1 = R2 = R for minimum sound / null point.

Formula :

f = _____

Repeat the experiment for three different frequencies.

Scheme of Marking :

1 Circuit diagram 4

2 Connections 4

3 Observations 6

4 Calculations with result 4

5 Oral 3

Total : 21



AllottedMarks

Marksobtained

byCandidate

Remarksif any

Z1

Z2

R3

R4

12πRC





7. Measurement of High Resistance

Measure the given high resistance by the method of nearly equal deflections.

X = + G - G

where X = Unknown high Resistance

G = Resistance of ballistic galvanometer = .............. ohms (Given)

d1 = Deflection when X is included in the circuit

d2



Scheme of Marking :


2 Procedure 6

3 Tabular form and observations 4

4 Calculations with results 4

5 Oral 3

Total : 21



AllottedMarks

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byCandidate

Remarksif any

d2

d1

R (S + G)

S


= Deflection when combination of R and S is included in the circuit.

Repeat the experiment for another unknown high resistance.

Take at least 3 different sets of R and S resistances for unknown high resistance.




8. LCR Series Resonance

Plot a resonance curve for a series resonant circuit for two different values of R.Calculate Q and

formula.

Fr = _____ L = ....................Henry (Given)

C = ................... Farad. (Given)

N. B. :- Do not pass the current before getting the connections checked.

Scheme of Marking :

1 Circuit diagram 4

2 Connections 4

3 Observations 5

4 Graph, Calculations and results 5

5 Oral 3

Total : 21



AllottedMarks

Marksobtained

byCandidate

Remarksif any

12π√LC where

2_f1

Quality facter Q=Fr

f2 - f1


Band width =f

band width in each case. Comment on the results obtained. Verify the resonant frequency using the

physics group-iii to iv - shivaji university schedule... · carey foster's bridge ... select...

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