Old Exam Papers Dec. 2010 - Video

6. (a) Explain Gauss law of electrostate. 3
fLFkj fo|qrdh ds xkWl fu;e dks le>kb;sA 3
(b) What is electric dipole moment ? Derive an
expression for torque on dipole when placed in
uniform electric field. 7
fo|qr f}/kqzo vk?kwZ.k D;k gksrk gS \ leku fo|qr {ks= esa
j[ks f}/kqzo ij cy vk?kw.kZ ds fy, lw= LFkkiuk
dhft;sA 7
7. (a) Why potentiometer is more sensitive than volt
meter ? 3
foHkoekih] oksYVehVj dh rqyuk esa lqxzkgh D;ksa gksrk
gS \ 3
(b) Using Ampere's law derive the expression for
magnetic field due to solenoid. 7
,Eih;j ds fu;e dks dke esa ysrs gq,] ifjukfydk ds
dkj.k mRiUu pqEcdh; {ks= ds fy, lw= LFkkiuk
dhft;sA 7
8. (a) What is resonance in LCR series circuit ?
Explain the difference between sharp and flat
resonance. 6
600 4 BPH
Papers (A) (December) 2010
(421)
xSlksa ds xR;kRed fl)kUr dh ifjdYiukvksa ds vk/kkj
ij xSl ds nkc ds fy, O;atd izkIr dhft;sA
6
4. (a) Explain harmonic and oscillatory motion. Give
examples also. 4
vkorhZ xfr o nksyuh xfr le>kb;sA mnkgj.k Hkh
nhft;sA 4
(b) Explain that only odd harmonics are produced in
closed organ pipe. 6
le>kb;s fd cUn vkWxZu uyh esa dsoy fo"ke lauknh gh
mRiUu gksrs gSaA 6
5. (a) What are the conditions of sustained interference ?
Write down and explain the formula of constructive
and destructive interference in Young's double slit
experiment. 6
O;frdj.k yxkrkj feyrk jgs bldh D;k&D;k 'krsZa gSa \
;ax f}&fLyV iz;ksx esa laiks"kh o fouk"kh O;frdj.k ds
lw=ksa dks fyf[k;s o le>kb;sA 6
(b) Explain the laws of reflection and refraction. 4
ijkorZu o viorZu ds fu;eksa dks le>kb;sA 4
BPH 3 PTO