Physics Plus Two.pdf - model question papers

14. Bohn proposed a new model ofatom
to ovelcome a problem of
Rutherford's atom model.
(a) Which specific problem of the
Rutherford model was
attempted to be solved bY
Bohmodel ? O)
(b) What are the basic Poshiates
ofBoh model ? . (3)
(c)
The radius of the inner most
electron orbit of a hYdrogen
alom is 5.3 x l0-ll m. What
are the radii of the n = 2 and
n=3orbits? A)
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15. A capacitor is a
901s
storing charges as well as energy. It
is bas€d ort a propertY called
capacltance.
(a) write the sl unit of
(b)
(c)
aapacitance and deflne it.
You are given two capacito$
of 2 pF and 3 pF. What are
the maximum and minimum
values of capacitance that can
be obtained by combidng
(f)
them ? (2)
Obtain an expr€ssion for the
electrostatic energy stored in a
capacitor. (3)
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(c)
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