1.) a hydrogen atom in an excited state emits a photon which has the longest wavelength of the paschen series. further emissions from the atom cannot include the
a) longest wavelength of the lyman series
b) 2nd-longest wavelength of the lyman series
c) longest wavelength of the balmer series
d) 2nd-longest wavelength of the balmer series
[main sochi thi mereko phy ata hai :( .... uparwala question.. poora mere upar se gaya ... :'( ]
15.) in the circuit shown above, cells are ideal and of equal emfs, the capacitance of the capacitor is C and the resistance of the resistor is R.
X is first joined to Y and then to Z. after a long time, the total heat produced in the resistor will be:
a) equal to the energy finally stored in the capacitor
b) 1/2 the energy finally stored in the capacitor
c) twice the energy finally stored in the capacitor
d) four times the energy finally stored in the capacitor
14.)
stat 1 : a real image is formed when two rays, starting from a point, and moving along different paths, meet again at some other point.
stat 2 : a real image can never be formed by reflection in a convex mirror or refraction in a concave lens.
62last question..
that is solved by v=iR!!!!!!
find the V with the charge that has flown
and i=dq/dt
then solve the differential equation.. :)
62prajith your explanationdoes nto seem correct to me..
check out wiki for pascal's law
it is something i think we study in class viii or ix
12.) the two ends of a long cylinder containing gas are maintained at different temperatures. which of the following quantities will have the same value throughout the cylinder?
a) pressure
b) density
c) the ratio of pressure to density
d) the no of molecules per unit volume.
ans pressure hai.... par pressure kaise ho sakta hai?? [12]
1wrt #7,,,, yeh wala aisa thaaaaa ????????? :O :O :O :O
chhi chhi
but y dat line ...: : further emissions from the atom cannot include the
?????????????????
1when we increase temperature there will be no change in pressure it will be explainable with any of the general examples.....and the change in pressure occurs only when we apply some force on one of the side...........
62for longest wavelength it has to be from state 4 to 3
largest from lyman is 2 to 1 which is possible
2nd is 3 to 1 whcih si possible
longest balmer is 3 to 2 which is possible
2nd longest balmer is 4 to 2 which is now not possbile..
1third question... i just dunno how to solve these kinda sums... pls gv a detailed soln...
13.) two conducting spheres of radii r and 3r initially have charges 3q and q respectively. their separation is much larger than their radii. if they are joined by a conductor of high resistance, the force btween them will:
a) increase continuously
b) decreases continuously
c) first inc then dec.
d)first dec then inc.
