MOST EXPECTED PHYSICS VIVA QUESTIONS FOR PHYSICS PRACTICAL

MOST EXPECTED PHYSICS VIVA QUESTIONS FOR PHYSICS PRACTICAL

EXPERIMENT : FOUR PROBE
1)    Energy band gap?
2)    Relation of resistivity and T?
           (In case of metal and semi-conductor with reason)
3)    Depletion layer?
4)    N- and  p- type semi-conductors example?


                                                    EXPERIMENT : I-H CURVE
1)    Retentivity and its plot on I-H curve?
2)    Solenoid?
3)    What does I-H curve area imply?
4)    Examples of para-, di- and ferromagnetic materials?
5)    What if I-H curve is broad?
6)    Magnetic meridian?

EXPERIMENT : PLANK’S CONSTANT
1)    Filter?
2)    Stopping voltage?
3)    Work function?
4)    Photon?
5)    Photovoltaic  cell and function?

EXPERIMENT : ENERGY BAND GAP
1)    Value of current in forward and reverse biasing? (Ans: milliampere and microampere resp.)
2)    Depletion layer?
3)    Example of acceptor and donor atoms?
4)    Majority charge carriers in n- and p- type semi-conductors?

EXPERIMENT : NEWTON’S RING
1)    Formula for interference?
2)    Factors on which diameter of newton’s ring depend?
3)    What if white light is used instead of sodium light?
4)    Why we use broad source?
5)    If water is added to lens will diameter change?

EXPERIMENT : MAGNETIC FILED DUE TO CIRCULAR COIL

1)    Magnetic meridian?
2)    Commutator key?
3)    Effect on B as distance increases?
4)    Examples of para-, di- and ferromagnetic materials?
5)    Biot-Savart law?
EXPERIMENT : DIFFRACTION GRATING
1)    Grating element?
2)    Diffraction angle : Red > = < Violet?
3)    Sodium light is used instead of white light. Will spectrum appear?
4)    Diffraction?
5)    What is a and b?

EXPERIMENT: HALL-COEFFICIENT
1)   If hall-coefficient is negative what does it indicate?
2)   Significance of hall-coefficient. What information do we get?
3)   Hall effect?
4)   n- and p- type impurities?