TED (1s) 2003

Reg. No.

(REVISION ,201s)

Signature

SECOND SEMESTER DIPLOMA EXAMINATION IN ENGINEERING/

TECHNOLOGY OCTOBER. 2016 E,\GINEERING PIIYSICS - II (C'ommon to all branches except DCP and CABM)

lTime: 3 hours (Maxirnr,un marks

PnRl'

-

:

100)

n

(Maxirnr.un rnarks

: i0) Marks

Answer all the questions

in

one

or two sentences. llach question carries

m o .c

2 marks.

of inertia and torquc.

l.

Write down the Sl units for tnoment

2.

What is meant by gravitational potential

?

3. State Kirchho{I"s laws ? 4. What is photoelectric work function ? 5. Distingursh betwecn nuclcar fission and fi'rsion ?

d a

y l o

p in

PNR|

(5x2 = 10)

IJ

(Mzxrmurn marks: 30)

m . w

(Answer cmy five questions lrorn the fullowing. Each qucstion carries 6 marks.)

w w

1. 2.

Derivc tho cxprcssion for morncnt of incrtia of a circuleLr disk about its own axis.

3.

l..xplain what is mcant

I:xplain the conicpts of centripetal lorce and derive the expression for i1 in the casc of a body in unifonn cjrcular motion.

by

geostationary satellitc and polar satellites. Discuss

thcrr uses. 4.

Discuss thc vanation of acceleration duc to gravity with altitude and depth.

5.

I:xplain thc tenns elcctrical rcsistance, rcsistivity and corrductivity.

6. 1.

.Dcrivc thc condition for balancing of

a

Wheatstottc's bndgc.

i:xplain the principles and working of solid stale lasers and its advantages. (5x6

l3l

-

30)

2

Marks C PART (Maximum marks: 60)

(Answer one full question from each unit. Each firll question caries 15 marks.)

UNrr-l

ili

(a) Explain the tenn angrlar nomentum and torque. How are they related ? (b) The Moon is orbiting the Earth in a nearly circular path radius 3,84,000 km with a period of 27.3 days. Calculate its angular velocity and centripetal acceleration

(c) A broad gauge railway tack is conskucted around a curve of radius 400m. tf the tuack is designed for a speed of ' 2A m/s, calculdte heigtrt difference betrveen outcr and irrner rails. (Vvidth

of broad gauge is 1.43m and g: 9.8

m/sz)

6

On

ry

(a)

'Why does a cyclist lean inward lvhile riding along a curved path the relevant formula for the leaning angle.

?

Write down

(b) State parallel axis theorem using a diagram and the relevant equation. The moment of inertia of a ciicular disk about a diameter is 20 kgm2. Calculate

m o .c

ils moment of inertia about a tangent.

(c)

Five tiny balls c-ach of mass I g arc arranged along a line as shown in figure. The seperation between adjacent masses is 0.02m. Calculate the moment of inertia and radius of gnation of the system about an axis perpendicular to the line of masses and throush the ball at the centre. m3.

d a

y l o

p in

UNn-II

(a) What is meant by gravitational potartial and gravitational

m . w

What is the relation between thern

VI

?

?

@) What is meant by geostationary satellite of geostationary satellite.

w w

potential energy

?

Derive an expnession for the height

(c) Gven

that the radius of the Earth as 6400km and acceleration due to Bravitv at the surface of the Earth, g = 9.8 ms-2. calculate escape vekrcity on thl surface of the Earth. On

(a) Write a note on Newton's faw of gravitation. (b) Find the orbital velocity of an artificial satellite moving at a height of 600 km &om the surface of the earth. Also calculate its period. (R : 6400 km and g:9.8 ms-2)

(c)

Find out the height at which the acceieration due to gravity becomes one fburth

of its value on the surface of the Earth. (R : 6400 km)

J

Marks

' VII

UNt.r-iIi

(a) Explain the prilnciple of shunt resistance. (b) A wire of length 1 m and diameter lmm has a resistance of 0.8 C). Calculate the resistivity of the material

(c)

wire.

of the

3

6

Five resistances each of l0 O, are connected as shown m figure. Calculate the effective resistance of the combination as measured between the torminals

AandB?

6

On

VIU

(a) Derive the

expression

for

the magnetic fieirl produces at the centre of a

curent canytng circular coil.

(b) With adequate theory explain horv a galvanometer volt meter

(c)

(a)

Given three resistances 12 O each. Draw the diagrams explain how these resistances can be combined to give 4 Q, 8 Q, 18 fl.

y l o

Calculate the enerry associated with photons mrresponding to wavelength 400nm. (Speed of light (c) 3x10t *r-t, Planck's constant (h) 6.63x10-34 Js)

:

p in

(b) Explain the Ernstein's theory of photoelectric

efflecl

:

(c) Explarr the energy production in the case of nuclear fission

m . w urto cneTgy.

d a

w w

and fusion.

a

J

6 6

On

(a) Find the amount of enerry obtained if

X

m o .c

?

UNrr-lV D(

can be.converted into a

1 gram of mass is completely converted 3

(b) Explain the characteristic properties of laser light.

6

(c) Write an essay on nuclear reactors.

6

ENGINEERING PHYSICS-II.pdf

Discuss thc vanation of acceleration duc to gravity with altitude and depth. I:xplain thc ... (b) Find the orbital velocity of an artificial satellite moving at a height of.

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