SUBJECT - PHYSICS

mounty woled navip end a CLASS - XIVI to musto nuclear easite

M.M. 70 MARKS

Time: 3:00 Hrs.

GENEREL INSTRUCTIONS:

1. All questions are compulsory.

1. There are 26 questions in all. Questions 1 to 5 carry 1 mark each, questions 6 to 10 carry 2 marks each, questions11 to 22 carry 3 marks each ,Q.No 23 carries 4 marks ,Q.Nos24 to 26 carry 5 marks each .

1. There is no overall choice. However, there is an internal choice in one question of 2 marks and one question of 3 marks and all three questions of five marks. you have to attempt only one of the

given choices in such questions. Y(X,1) = 0.005 Sir

1. Use of calculator is not permitted.
2. Draw neat &labelled diagrams with pencil where -ever required.
3. You may use the following physical constants wherever necessary:

Boltzmann constant

<math>K_B = 1.38 \times 10^{-23} \text{J/K}</math>

<math>g = 10 \text{ m/s}^2</math>

<math>N_A = 6.023 \times 10^{23} / \text{mole}</math>

<math>\rho = 13.6 \times 10^3 \text{kg} / \text{m}^3</math>

v=340m/s

Acceleration due to gravity Avogadro's Number Density of mercury Velocity of sound

[P.T.O.]

GGRO-1104

2

Name the unit used to measure size of a nucleus of an atom . Also write its equivalence in SI system 2.

<math>|\vec{A} + \vec{B}| = |\vec{A} - \vec{B}|</math>

1. Stress - strain graph of two metals A & B are given below. Which one of the two is more elastic and why

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A 7 INSTRUCT

Stress В All questions are

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marks each

1. "To keep a piece of paper horizontal in air, you should blow over,

not under it." Explain. nd America to no seem one 1

∆⊅5. A wave travelling along a string is given by

given choices in s

<math>Y(x,t) = 0.005 Sin(80 x-3t)</math>

Where the numerical values are in SI units. Symbols have their

usual meanings Calculate the velocity of the wave.

Kinetic energy is given by the following formulae:

1. K.E.=3/16mv²
2. <math>K.E.= 1/2 \text{ mv}^2 + \text{ma}</math>

Select the correct formula on the basis of dimensional arguments:2

Prove the following statement" for elevations which exceeds or fall

short of 45° by equal angles, the ranges are equal".

[P.T.O.]