21for dielectric quest i feeel abhi is spot on!!!
"the medium with lesser dielectric constant will have greater no. of lines of force passing through it."
take eg. of metal sheets n u'll realise....
kmetal = ∞...... and u know dat they are insulators so zero lines of force
13the medium with lesser dielectric constant will have greater no. of lines of force passing through it.
1d(2lcosθ)/dt=v;
2l*(-sinθ)dθ/dt=v;
w=dθ/dt=v/2lsinθ......(magnitude)
(sign is negative as θ is decreasing)
now velocity of point A is w*l=v/2sinθ=v; (as θ=30)
diagram on next page.....vel. is tangential to the circle...
1hey,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
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1for the dilectric question i feel dat its option C becoz.. as we know dat the isolated sphere is an equipotential surface hence forth.. electric field lines shud be perpendicular.. and in the figure it means electric field lines should be radially outward [1] in the sphere. so as force [1] . so such lines forche cant be possible at all
3n hey, priyam, in dat wire frame que, r all the arm lengths of the frame equal.. ie is it given as rhombus ??
33yeah all arms are equal..
and thanks everyone for dielectric...
3n yaa...got dat wire frame one...
let O be the centre of the frame...
use OA^2 + OB^ = AB^2 - (1)
OA^2 + OD^2 = AD^2 - (2)
differentiate both sides of these two eqn wrt time...u will get the answer...
21nice constraint concept....
badhey e j vapras ke su? [7] LOL .... gud gud lage raho
1arey haan bhai v/2 x direction mein aur root3v/2 -y direction mein
i have already told tangential to circle and net velocity is v.
ok i will do a little bit of editing in diagram....
1@priyam can u check the answer it sud b -ve j. or it is printing mistake.
1yellow yellow dirty fellow!! [1] oh! this is also yellow.....
33
A wire frame...Velocity given to D is v.. and angle is 300... Find velocity of end A.
33distance betwwn 2 conc particles in same disp. is λ/2=10mm
check that..
3sorry wat i wanted to say is distance between to conc. particles having same maximum displacement in a standing wave is λ/2
