## B.Sc. IT (104) BASIC SCIENCES AND HUMANITIES

• Wednesday, September 26, 2012

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Roll No. .................
Total No. of Questions : 13]                                                                                      [Total No. of Pages : 02
Paper ID [A2004]
(Please fill this Paper ID in OMR Sheet)
I B.Sc. IT (104) (O) (Sem. - 1st)
BASIC SCIENCES AND HUMANITIES

Time : 03 Hours                                                                                                      Maximum Marks : 75

Instruction to Candidates:
1) Section - A is Compulsory.
2) Attempt any Nine questions from Section - B.

Section - A
(15 x 2 = 30)
Q1)
a) Explain the significance of mass energy equivalence.
b) What are limitations of theory of dimensions?
c) Why SI system of units is a rational system?
d) How random error can be minimized?
e) Give dimensional formula for coefficient of friction and potential energy.
f) Define I second.
g) Can distance covered by a body be zero?
h) What is importance of resolution of a vector in a plane?
i) What are differences between scalar and vector products?
j) Plot the graph between speed and time for a body moving with uniform
speed in one dimension.
k) What are various methods of reducing friction?
l) Why a cricketer lowers his hands while taking a catch?
m) Discuss the importance of work-energy theorem.
n) Define 1 J.
o) Define (i) null vector and (ii) collinear vectors.
Section - B
(9 x 5 = 45)
Q2) If rX = 2Ë†i + 3 Ë†j + 4 Ë† k and rY = 3Ë†i + 2 Ë†j + Ë† k , then calculate angle between these two vectors.
Q3) Prove that Newton’s second law of motion is universal law of motion.
Q4) The error in a is 1%, in b is 2% and in c is 3%. If X = a2bc, find error in X.
Q5) If force F = (3 ± 0.04) N and mass m = (2 ± 0.01) kg, find acceleration within error limits.
Q6) Find the displacement in 70 s from the following graph:
Q7) Two vectors rA and rB are inclined at an angle Ã¨ to each other. Find the relation for magnitude of the resultant.
Q8) Two masses of m1 and m2 are moving with equal kinetic energies. What is the ratio of the magnitudes of their linear momentum?
Q9) What is positive, negative and zero work done? Discuss with examples.
Q10)Derive the equations for uniformly accelerated motion.
Q11)What are various four basic forces in natures? What is the ratio of their magnitudes?
Q12)A particle moves half distance of the total journey with velocity V1 and other half with velocity V2. Calculate the average velocity for the whole journey.
Q13)What is kinetic, static and limiting friction? Plot the graph between applied force and friction to explain these types of friction.