(Turning
potential into performance)
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Saidabad, Hyderabad, Telangana, India
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PHYSICS SECOND YEAR IMPORTANT QUESTIONS AND ANSWERS
SECTION-C
QUESTION
NUMBER 19
WAVES AND RAY OPTICS AND OPTICAL INSTRUMENT (8
MARKS)
1. Explain the formation of stationary wave in
stretched strings and hence deduce the law of transverse wave in stretched string?
2. Explain the formation of stationary wave in an
air column enclosed in open pipe. Drive the equations for the frequencies of
the harmonics produced?
3.Explain the formation of stationary wave in an air
column enclosed in closed pipe. Drive
the equations for the frequencies of the harmonics produced?
4. What is Doppler Effect? Obtain an expression for
the apparent frequency of sound heard when the source is in motion with respect
to an observer at rest?
5. What is Doppler’s shift? Obtain an expression of
the apparent frequency of sound heard when the observer is in motion with
respect to a source at rest?
6. a)Define Snell’s law, using a neat labelling
diagram derive an expression for the refractive index of the material of the
equilateral prism ?
b) A ray of light, after passing through the medium,
meets the surface separating the medium from air at an angle of 450
and is not just refracted. What is the refractive index of the medium?
7. Draw a neat labeled diagram of a compound
microscope and explain its working . Derive an expression for its
magnification.
QUESTION
NUMBER 20
CURRENT
ELECTRICITY AND MOVING CHARGES AND MAGNETISM (8 MARKS)
9. State Kirchhoff’s laws for electrical network.
Using these laws deduce the condition for balancing in a Wheatstone
bridge?
10. State the working principle of potentiometer
explain with the help of circuit diagram. How the emf of two primary cells are
compared by using the potentiometer?
11. State the working principle of potentiometer
explain with the of circuit diagram how the potentiometer is used to determine
the internal resistance of the given primary cell?
(Save
side)
12. Obtain the expression for the torque on a
current carrying loop placed in a uniform magnetic field, Describe the
construction working of a moving coil galvanometer?
13. Deduce an expression for the force on a current
carrying conductor placed on the magnetic field. Derive an expression for the
force per unit length between two parallel current carrying conductors.
14. Derive an
expression for the force per unit length between two parallel current carrying
conductor and hence define Ampere.
QUESTION
NUMBER 21
ATOMS
AND NUCLEI (8 MARKS)
15. Explain the principal and working of a nuclear
reactor with the help of a labelled diagram?
16. What is
radioactivity? State the law of radioactive decay. Show that radioactive decay
is exponential in nature?
17. Define mass defect and binding energy. How does
binding energy per nucleon vary with mass number? What is its significance
18. Explain the source of stellar energy. Explain
carbon nitrogen cycle,Proton-proton cycle occurring in stars
19. Describe the Geiger and Marsden experiment what
did this experiment conclusively prove?
20. Discuss Bohr’s theory of spectrum of hydrogen
atom?
21. State postulates of Bohr’s theory of atomic
spectra. Hence obtain the expression for the radius of orbit and energy of
orbital energy electron in hydrogen atom?
22. What is rectifier? Explain the working of half
wave and full wave rectifiers with diagram?
SECTION-B
QUESTION NUMBER 11
RAY OPTICS AND OPTICAL
INSTRUMENTS (4M)
1. Define critical angle. Explain total internal
reflection using a neat diagram?
2.With a neat labelled diagram explain the formation
of image in a simple microscope?
3. Explain the formation of a rainbow
4. Explain the formation of mirage
5. Why does the setting sun appears red
QUESTION NUMBER 12
WAVE OPTICS (4M)
1. Explain Doppler Effect in light. Distinguish
between red shift and blue shift?
2. Does the principle of conservation energy holds
for interference and diffraction phenomenon
3. Derive the expression for the intensity at a
point where interference of light occurs. Arrive at conditions for maximum and
zero intensity?
4. What is total internal reflection? Explain the
phenomenon using Huygens principle?
5. How do you determine the resolving power of your
eye.
QUESTION NUMBER 13
ELECTRICAL
CHARGES AND FIELDS [4M]
1. State and explain Coulomb’s inverse square law in
electricity?
2. Derive an equation for the electric potential
couple acting on an electric dipole in a uniform
electric field?
3. Derive an expression for the intensity of
electric field at a point on the axial line of a dipole?
4. Derive an expression for the intensity of the
electric field at a point on the equatorial plane of an electric dipole?
5. State
Gauss’s law in electrostatic and explain its importance.
6. Define intensity of electric field at a point.Derive
an expression for the electric potential due to point charge?
QUESTION
NUMBER 14
ELECTRIC
POTENTIAL AND CAPACITANCE.
1. Derive an expression for the equivalent capacitance
when capacitors are connected in series
of a parallel
plate capacitor?
2. Derive the formula for the equivalent capacitance
when capacitors are connected in parallel.
3. Derive an expression for the capacitance of a
parallel plate capacitors
4. Three capacitors of capacitance 2pF, 3pF and 4pF
are connected in parallel
(a) What is total capacitance of the combination
(b) Determine the charge on each capacitors if the
combination is connected to a 100V supply.
5. Three capacitors of capacitance 9pF are connected
in series.
(a) What is the total capacitance of the combination
(b) What is the potential difference across each
capacitors if the combination is connected to a 120V supply
6. Derive an expression for the electric potential
due to point charge.
7.
QUESTION
NUMBER 15
MOVING
CHARGES AND MAGNETISM
1. State and explain Biot-Savart law?
2. Find the magnetic induction due to long current
carrying conductor.
3. A current of 10A passes through two long wires
held parallel to each other and separated by a distance of 1m. What is the
force per unit length between them.
4. A moving coil galvanometer can measure of
A. What is the resistance of the shunt
required if it is to measure 1A
5. A long straight wires carries a current of 35A.What is the
magnitude of the field B at a point 20cm from the wire.
6. A circular coil of wire consisting of 100 turns, each of
radius 8cm carries a current of 0.40A. What is the magnitude of the magnetic
field B at the centre of the coil.
7. Two long and parallel straight wires A and B carrying
currents of 8.0A and 5.0A in the same direction are separated by a distance of
4.0cm. Estimate the force on a 10cm section of wire A.
8. Derive an
expression for the magnetic induction at the centre of a current carrying
circular coil using Biot-Savart law?
QUESTION
NUMBER 16
MAGNETISM
AND MATTER
1. Derive an expression for the axial field of a
solenoid of radius “r”, containing “n” turns per unit length and carrying
current “i”?
2. How do you distinguish between dia, para and
ferromagnetism in matter.
3. The force between two magnet poles separated by a
distance ‘d’ in air is “F”. At what distance between them does the force become
doubled.
ELECTROMAGNETIC
INDUCTION
4. Obtain an expression for the emf induced across a
conductor which is moved in a uniform magnetic field which is perpendicular to
plane of motion.
5. Describe the ways in which eddy currents used to
advantages.
6. Current in a circuit falls from 5.0A to 0.0A in
0.1sec. If an average emf of 200V is induced given an estimate of the self
inductance of the circuit.
7. Obtain an expression for the mutual inductance of
two long co-axial solenoids?
QUESTION
NUMBER 17
ATOMS
1. What are the limitations of Bohr’s theory of a
hydrogen atom.
2. What is impact parameters and angle of
scattering? How are they related to each other.
3. Derive an expression for potential and kinetic
energy of an electron in any orbit of a hydrogen atom according to Bohr’s
atomic model. How does P.E changes with increasing ‘n’.
4. Explain the distance of closest approach and impact
parameter.
5. Explain the different types of spectral series.
QUESTION
NUMBER 18
SEMI
CONDUCTOR
1. Describe how a semiconductor diode is used as a
half wave rectifier?
2. What is rectification? Explain the working of a
full wave rectifier?
3. What are n-type and p-type semi conductors? How
is a semiconductor junction formed
4. Distinguish between Zener break down and
avalanche breakdown?
5. Distinguish between half wave and full wave
rectifiers?
VSAQ
Chapter No: 2, 8, 9, 10, 11, 12, 15, 16 (All Answers)
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