64 m kj izns'k jktf"kZ V.Mu eqDr fo'ofo|ky;] bykgkckn

2
521
m kj izns’k jktf"kZ V.Mu eqDr fo’ofo|ky;] bykgkckn
vf/kU;kl (Assignment) 2012-2013
Lukrd foKku dk;Z e …ch-,l-lh-‰
Bachelor of Science Programme (B.Sc.)
fo"k; % HkkSfrd foKku fo"k; dksM % ;w-th-ih-,p-,l-
Subject : Physics Subject Code : UGPHS
dkslZ ’kh"kZd % dkslZ dksM % ;w-th-ih-,p-,l-
Subject Title : Ossilation & Waves Course Code : UGPHS-03
vf/kdre vad % 30
Section - A
[k.M - v
Maximum Marks : 30
vf/kdre vad % 18
Maximum Marks : 18
Note : Long Answer Question. Answer should be given in 800 to 1000 words.
Answer all questions. All questions are compulsory.
uksV % nhkZ m kjh; iz’uA vius iz’uksa ds m kj 800 ls 1000 ’kCnksa esa fy[ksaA lHkh
iz’u vfuok;Z gSaA
1. (a) Solve the equation of motion of a clamped harmonic
oscillator. 6
(b) Discuss dependence of average power, absorbed by the oscillater, on
the frequency of the external harmonic force.
(a) ,d voeafnr ljy vkorhZ nksyd ds xfr ds lehdj.k gy dhft,A
(b) nksyu }kjk vkSlr vo’ksf"kr ’kfDr dh ckÆ cy dh vko‘f k ij fuHkZjrk
dh foospuk dhft,A
2. (a) What do you understand by statimacy and progressive waves compare
it 6
(b) A string, fixed at both ends, is vibrating in two loops. Indicate
graphically the shape of the string and find its frequency.
(a) vizxkeh rFkk izxkeh rjaxksa ds D;k le>rs gSa foHksn dhft,\
(b) nksuksa fljksa ij fLFkj ,d rkj nks ywiksa esa dEiUu dj jgk gSA rkj dh
vkd‘fr dk vkjs[k cukb;s rFkk vko‘f k izkIr dhft,A
3. (a) Obtain the expression for speed of plane wave in a fluid. 6
(b) Prove that kinetic & potential energy dunitics for one dimensional
progressive wasve ina fluid are equal at all points & all times.
(a) fdlh rjy esa ,d lery rjax ds fy, xfr dk O;atd izkIr dhft,A
(b) ,d rjy esa foHkh; izxkeh rjaxksz ds fy, fl) dhft, fd xfrt o
fLFkfrt ¯.kZ /kuRo dk eku ldh fcUnqvksa ,oa le;ksa ij leku jgrk gSA
Section - B
[k.M - c
vf/kdre vad % 12
Maximum Marks : 12
Note : Short Answer Question. Answer should be given in 200 to 300 words.
Answer all questions. All questions are compulsory.
uksV % ykq m kjh; iz’uA vius iz’uksa ds m kj 200 ls 300 ’kCnksa esa fy[ksaA lHkh
iz’u vfuok;Z gSaA
1. Discuss different modes of natural oscellation of a string tied at its two
ends i.e., x = o and x = 1. 2
x = o vkSj x - L ij ca/kk gqvk izkd‘frd fo/kkdska esa dEiUu dh O;k[;k
dhft,A
2. What is ultrasonic waves Discuss piezoelectric effect. 2
ijkJO; rjaxsa D;k gSaA fitks bysfDV“d izHkko dh O;k[;k dhft,A
3. what in foarier series obtain the expression for the various coefficients
in it. 2
wfj;j dk Js.kh D;k gS\ fofHkUu wfj;k ds xq.kkadksa dks izkIr dhft,A
4. Draw the graphical representation of function and find its fouries series
for ¦(x) = x when O < x < 2P. 2
(b) Qyu dk vkys[kh; iqu% izLrqrhdj.k dhft,A
¦(x) = x ,oa O< x i D < x < 2P