SOLVE DIS PHYSICS sums :)

4.) the 4th one..

two things to remember:

I) the sign of B will change.

II) the graph will follow the eqn. B= μ₀i/2Î r [edited]

(a rectangular hyperbola)

current chole gelo !! :'( :'(

will post after it comes ok ?

SKY PLZ MAKE ME CLEAR ABOUT DA ANSWER :) PF PROBLEM 4 or .. coz that option was dere.. but i cudnt understand how it happened .. ar why will the graph follkow E = kQ/r^2?.. plz explain clearly :)

sorry play.. , i was in a hurry... so wrote wrong things...

PLZ HELP SUM NO. 28 AND 86

ny answers 4 d 3rd one? wat has d pin to do wit it? c.o.m.?

nope :Odat was what da sum was given i have checked [1] plz try den 86

never saw such a post ... always forget to check general phy . section [2][2][2][2][2][2]..

okie any wayz ..... that sq. plate y have u scribbled on the right part of it???????? is that a hinge ????

SOMEONE HELP

Question: 86
For small angular displacement θ
The total energy of the system can be written as
T=1/2 k (bθ)²+1/2 I ω²

where I is the moment of inertia about B.

Since the energy is conserved.
dT/dθ=0
or
kb²Î¸ dθ/dt + I ω dω/dt=0
since ω=dθ/dt
we get
ω(kb²Î¸+I dω/dt)=0
or
d²Î¸/dt²=-kb²Î¸/I

Thus ang. acceleration is proportional to ang. displacement
or
ω²=kb²/I
or Time period T=2Î √I/kb²