Engineering Physics -1st Semester question papers( Diploma in Engineering All)

Bibek00 May 01, 2024

Engineering Physics -1st Semester question papers( Diploma in Engineering All)

Regular/Back/Scholarship Exam-2080, Baishakh / Jestha

Program:Diploma in Engineering All Full Marks: 60

Year/Part: II (Old + Very Old) Pass Marks: 24

Subject: Engineering Physics I Time: 3 hrs.

Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.

Group 'A'

Attempt All questions.

1.State and explain principle of conservation of linear momentum. [3×6=18]

OR

What is satellite? Derive the expression for orbital velocity and show that square of time period for satellite is proportional to cube of distance between satellite and earth.

2.Stating the postulates of kinetic theory of gas, derive an expression for the pressure exerted by a gas in a container.

3.Define minimum deviation. What are the conditions for minimum deviation? Derive an expression for refractive index for prism in terms of angle of angle of prism and minimum deviation. www.bibek00.com

Group'B'

Attempt Any Six questions. [6×3=18]

4.Differentiate between scalar multiplication and vector multiplication of two vectors with examples..

5.Define simple pendulum. Show that motion of simple pendulum is simple harmonic motion.

6.What is moment of inertia of a rigid body? Deduce its relation with rotational kinetic energy of the body.

7.Define cubical expansivity. Derive the relation y=3x where symbols have their usual meaning.

8.State and explain Stefan's law of black body radiation.

9.What is total internal reflection? Show that sinc angle and u is refractive index. where, C is critical angle and u is refractive index.

10.State and derive tangent law in magnetism. www.bibek00.com

Group'C'

Solve Any Six Problems. [6×4=24]

11.A car mass moves 100kg moves up an inclination of 30° at constant speed of 20m/s, calculate the power developed by the engine if the co-efficient of friction is 0.2 (g=10m/s²).

12.A motor cycle rider going 90Kmhr around a curve path with a radius of 100m must lean at an angle to the vertical. Find the angle at which he leans.

13. A metal of mass 100gm at 100°c is dropped into 80gm of water at 20°c contained in a calorimeter of mass 120gm. The final temperature of the calorimeter and its contents rises to 30°c. Determine the specific heat capacity of the metal, specific heat capacity of copper 0.0094 cal/gm°c, specific heat of water-1 cal/gm°c.

14.Find the temperature at which the r.m.s. velocity of a gas is half of its value at O°C.

15.The image obtained by cancave mirror is erect and three times the size of the object. The focal length of mirror is 20cm. calculate the object and image distance.

16.What is the apparent position of an object below a rectangular block of glass 6cm thick if a layer of water 4cm is on top of the glass?

Refractive index of glass = 1.5

Refractive index of water = 1.33

17.Calculate the horizontal component of earth magnetic field if the earth's magnetic field at a place where the dip angle is 60° and the vertical component is 3.464x10 T.