NIOS TMA Physics (312) Tutor Marked Assignment 2021
NIOS TMA Physics (312) Tutor Marked Assignment 2021 Question Paper with their Answers DOWNLOAD FROM BELOW LINKS
NIOS TMA Physics 312 Tutor Marked Assignment 2021 Nios Solved Assignment Links (1) Download NIOS TMA File (2) Download NIOS TMA FILE 2021
Check Your Questions Papers and Instructions below: Physics (312) Tutor Marked Assignment Session 2020-21 (Physics-312) -12th Class
Max.Marks: 20
Note : (i) All questions are compulsory. The marks allotted for each question are given beside the questions.
(ii) Write your name enrollment numbers, AI name subject on the top of the first page of the answer sheet.
(1) Answer any one of the following questions in about 40-60 words.
(a) Two trains 120m and 80m in length are travelling in opposite directions with velocities 42 kmh–1 and 30 kmh–1 respectively. How much time will they require to completely cross each other?.
(b) An interesting act performed at a variety show is to swing a bucket of water in a vertical circle such that water does not spill out while the bucket is inverted at the top of the circle. Derive the expression for minimum speed of the bucket at the top of the circle in
terms of its radius R. Calculate the speed if the diameter of circle is 1.5 m.
(2) Answer any one out of the following questions in about 40 to 60 words.
(a) Calculate the moment of inertia of the angle section about the X-axis.
(b)Define Young’s Modulus of elasticity. How much force is required to have an increase of 0.4% in the length of a metallic wire having radius of 0.2mm. Y = 9.1 x 1010 Nm–2
(3) Answer any one out of the following questions in about 40 to 60 words.
(a) Define specific heat of a gas at constant pressure. Derive relation between cp and cv.
(b) The ratio of the coefficients of thermal conductivities of two different materials is 4:5. To have the same thermal resistance of the two rods of these materials of equal thickness, what should be the ratio of their lengths?
(4) Answer any one out of the following questions in about 100 to 150 words.
(a) An object is placed 21 cm in front of a concave mirror of radius of curvature 10 cm. A glass slab of thickness 3 cm and refractive index 1.5 is placed close to the mirror in the space between the object and the mirror. Find the position of the final image formed. Take
the distance of the near surface of the slab from the mirror to be 1 cm.
(b)What is amplitude modulation? Explain the block diagram of a practical AM transmitter.
(5) Answer any one out of the following questions in about 100 to 150 words.
(a) How can the resolving power of a telescope be increased? A telescope has an objective of focal length 50 cm and an eyepiece of focal length 5 cm. The least distance of distinct vision is 25 cms. The telescope is focused for distinct vision on a scale 200 cms away from
the objective. Calculate (i) the separation between objective and eyepiece (ii) the magnification produced.
(b) A projectile is launched from point O at an angle of 22° with an initial velocity of 15 m/s up an incline plane that makes an angle of 10° with the horizontal. The projectile hits the incline plane at point M.
(i) Find the time it takes for the projectile to hit the incline plane.
(ii) Find the distance OM.
(6) Prepare any one project out of the following projects given below.
(a) Take a 1 m long thread of negligible mass. Consider three spherical/ cuboidal bobs of same sizes but different masses. Form simple pendulum using thread and bob, and estimate the time period of each of the pendulum by recording time for 20 oscillation three times
for each pendulum formed. Tabulate the observations taken. Interpret your results and justify. List your 2 main conclusions derived from the above project.
(b) Consider an object of mass 50 kg. Estimate the weight of the object at a distance R, 2R, 4R, 6R and 10R from the centre of the earth. Plot a graph showing the weight of the object with respect to the distance from the centre of the earth. What would happen to the
graph if the earth shrinks to half of its radius. Show on the graph how the mass of the object varies with distance. What specific conclusions will you be able to draw from the observations of the graph. List all your conclusions drawn.
