IIT-JEE 2010 - Career Point

22. (i) State Brewster's law for polarization .
(ii) If the Brewster's angle for the given pair of
medium is i p then express the critical angle for the
same pair of media in terms of i p .
(iii) If the lens is made of medium-2 and placed in
medium-1. If the absolute refractive Index of
medium-2 is µ 2 and of medium-1 is µ 1 then µ 2 > µ 1 .
Is it correct or not.
(iii) Where to put the proton that it will have
maximum force on it.
27. For the given configuration find the -
–2q
2a
2a
Incident rays
Medium-1
Refracted rays
Medium -2
Medium-1
+q
+q
2a
(i) Dipole moment of the system.
(ii) Electric potential energy of the system.
23. What is the need of Modulation in communication
system. Draw the shapes of signal, carrier wave and
amplitude Modulated wave.
24. How a Galvanometer can be converted into Ammeter
explain it by drawing the circuit diagram.
⎛ i ⎞
Prove that S = ⎜
g
⎟ G
⎝ i − i g ⎠
G = Resistance of Galvanometer coil
S = value of shunt
i g = Full scale deflection current for Galvanometer
i = Range of Ammeter.
25. (i) Find the equivalent resistance between A and B
for given fig.
R
A
R
R R
R
R R B
(ii) α is the symbol for the temperature coefficient of
resistivity for the given material. If α → 0 then the
material will be copper or constantan ?
26. (i) What is the angle between electric field line and
equi-potential surface.
(ii) If E a , E b and E c are the electric field intensities at
points a, b and c respectively, where to put a proton
that it will have the maximum electric potential
energy.
a
b
c
28. Draw the circuit diagram for common emitter
transistor amplifier. Explain its working. What is the
phase difference between input and output voltage in
case of common emitter transistor amplifier.
29. Explain construction and working of cyclotron. Why
cyclotron can not be used to accelerate the electrons.
30. State Ampere's circuital law. Using Ampere's
circuital law find the magnetic field at the axis of the
long solenoid.
CHEMISTRY
1. Give the IUPAC name of the organic compound
(CH 3 ) 2 C = CH – C – CH 3 .
||
O
2. Complete the following reaction :
CH 3 – CH 2 – CH = CH 2 + HCl → …..
3. State a use for the enzyme streptokinase in medicine.
4. What is copolymerization ?
5. Which type of a metal can be used in cathodic
protection of iron against rusting ?
6. Why is the bond dissociation energy of fluorine
molecule less than that of chlorine molecule ?
7. What is meant by inversion of sugar ?
8. What are the types of lattice imperfections found in
crystals ?
XtraEdge for IIT-JEE 71 DECEMBER 2009