Kurukshetra University 2007 A.M.I.E.T.E Information Technology Physics - Question Paper

H] 1) describe Threshold energy? What units are used for the measurement of threshold energy?
What is 1unit equivalent to in terms of J? (3)

2) Why should a material acting as a thermion emitter have threshold energy? (1)

I] 1) describe angle of dip. At what places on earth will the angle of dip be
(1) maximum & (2) minimum (2)

2) Write an expression force, derived from Newton's 2nd legal regulations of Motion and
discuss the different symbols used.

part II

Q.2] A] 1) describe work? (1)

2) Derive a formula to compute work. (2)

3) What is the relation ranging from Joule and Erg. (2)

4) Which formula is used to compute work done when the body is displaced in a
direction other than the direction of applied force. (1)

B] A cricket ball at rest is hit by a bat such that force acts on the ball for 0.3sec. If the ball has a
mass of 150gm and covers a distance of 300m in three sec. obtain the magnitude of force. (4)


Q.3 1) Steam at 100°C is passed over 2000 g of ice at 0°C. After a few time 1200 gm of
ice at 0°C is left and 850 g of water at 0°C is formed. compute the specific latent of
vaporization of steam. (Given specific heat of fusion of ice = 4200J/kg°C and specific
latent heat of fusion of ice = 3,36,000 J/kg). (4)

2) What is freezing mixture? provide 2 of its uses (3)

3) State 2 ways of increasing the boiling point of liquid. (2)


Q.4 1) With the help of a neat labelled diagram derive the relation ranging from real depth and apparent depth. (8)

2) The refractive index of glass, when a ray of light travels from air to glass is 1.2. compute the
refractive index when light travels from glass to air. (5)

3) When we sit around a campfire, the face of a person sitting opposite by you appears to
Shimmer------ discuss. (2)

Q.5 1) What do you mean by quality of a note? (8)

2) a) what is resonance? (1)

b) provide the conditions under which resonance occurs. (5)

c) With the help of a diagram provide 1 example of the phenomenon based on resonance. (2)

Earning:   Approval pending.