Physics Plus Two.pdf - model question papers

10. ln inteference and diffractiol of
light, dark and b ght bands are seen
on th€ screen.
(a) Do these Phenomena violate
thc law of conseryation of
energY ? Explain. (r v)
(b) ln an interference Pattem, the
ratio of maximum intensity to
minimum intensitY is 36 : 9'
l'ind the ratio of amplitudes
inreNities of the two
interfeling waves.
10.
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A series LCR AC circuit has
great practical importance' It is used
for tuning radio, TV, wireless sets
etc.
(a) Obtain an exPression for
current in a series LCR AC
circuit using Phasor diaglam (3)
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(3)
9015
(b) Under what condition, this
circuit is used for tuning ? (1)
(b) p'e (rl)dd,Jls sjl6rrn5srtoi
g.lococqjld6rcdi d'glo)lmoi
.O6qoocn? (1)
P.T.O.