III B.Sc.: Physics Semester V Paper V Electricity, Magnetism and Electronics (Model Paper) 2017
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III B.Sc.: Physics
Semester V
Paper V Electricity, Magnetism and Electronics (Model Paper) 2017
SECTION
– A


I.

Answer any
FIVE of the following questions:

5
x 5 = 25 M


1.

Derive the relation among D, E and P.


2.

Derive expression for the potential due to
a point charge.


3.

What is Hall Effect
? Write the applications of Hall Effect.


4.

Derive an
expression for the self inductance of a long solenoid.


5.

Write the integral
an differential forms of Maxwell’s equations.


6.

Calculate the
resonance frequency of a LCR series circuit with a resistance 10W inductance 20 mH
and a capacitance of 0.02 mF.


7.

For a transistor a = 0.95 and its
emitter current is 1 mA. Find its base and collector currents.


8.

Convert following
Binary to Decimal.


SECTION – B


II.

Answer ALL
of the following questions:

5
x 10 = 50 M


9.

a)

State and prove Gauss’s law.



(OR)



b)

Explain the boundary conditions at the
dielectric surface.


10.

a)

State and explain
Biot–Savart’s law. Derive an expression for the magnetic induction at a point
o the axis of a current carrying solenoid.



(OR)



b)

Describe the
construction and working of a transformer. Explain its energy losses.


11.

a)

Describe the
behaviour of series LCR circuit when an alternating voltage is applied to it.
Explain the condition for resonance.



(OR)



b)

Derive the equation
of electromagnetic wave and hence determine the velocity of propagation of
electromagnetic wave in free space.


12.

a)

What is transistor
? Explain the working of PNP and NPN Transistor.



(OR)



b)

Explain the CE
characteristics of a Transistor.


13.

a)

Explain the
functioning of a Half Adder and a Full Adder along with respective truth
tables.



(OR)



b)

State and prove
Demorgan’s laws. Realize AND, OR and NOT gates from NAND logic.


THE END