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NIOS Physics (312) Solved Assignments [TMA] 2023-24

NIOS SOLVED ASSIGNMENTS [TMA] 2023-24

SENIOR SECONDARY SOLVED [TMA] 2023-24 for Class 12

Physics (312)

Tutor Marked Assignment

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Max. Marks: 20

Note:

(i) All questions are compulsory. The marks allotted for each question are indicated against each question.

(ii) Write your name enrolment number, AI name, and 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 vector quantities are represented by :

r= rxi + ryj

F = Fxi +Fyj

Write the scalar, and vector products of these quantities. Give the names of two physical quantities which are obtained as the scalar product and vector product of two vector quantities. (See Lesson-1)

b) Displacement of a simple harmonic oscillatoris expressed by the following equation.

Y = 10^-2sin (314t + π/4)

Where all the quantities art taken is SI units. Find the following characteristics of its oscillations. (i) Amplitude, (ii) Frequency, (iii) Initial Phase, (iv) Amplitude of velocity. (See Lesson -13)

2. Answer any one of the following questions in about 40-60 words.

a) The position-time graph of a particle moving in a straight line is given in the figure shown alongside. Calculate the average speed and average velocity of the particle.  (See Lesson -2)

Ans - Answer Anyone

b) The distance of the image formed by anequi-convex lens, in air, from its second focus, x2=30 cm, while the distance of the object from the first focus is, x1= 10 cm. calculate the focal length of the lens. (See Lesson -20)

Ans - Use the lens formula, 1/f = 1/x₁ + 1/x₂,

where f is the focal length,

x₁ is the object distance, and

x₂ is the image distance.

Given x₁ = 10 cm and x₂ = 30 cm, you can calculate the focal length as 1/f = 1/10 + 1/30, which simplifies to f = 15 cm. So, the focal length of the lens is 15 cm.

3. Answer any one of the following questions in about 40-60 words.

a) A long aluminum channel is bent in the form shown in the figure. What is the minimum height from which a marble should be rolled down in the channel so that is may negotiate the full loop and come out from the other side. (See Lesson -4)

b) The magnifying power of an astronomical telescope is 100. In its normal adjustment the distance between the centres of the objective and eye piece of the telescope is 8.08 m. calculate the values of focal lengths of the objective and eye piece of the telescope. (See Lesson -23)

4. Answer anyone of the following questions in 100-150 words.

a) In Physics books you might have noticed the mass of earth to be 5.97x10 24 kg. Suggest a method by which the scientists find out the mass of earth. (See Lesson -5)

b) Why do we have to modulate signals for effective wireless telecommunication? Give any three reasons. What do we do in the process of modulation? For Communication in the following devices which radio frequency bands do we use?

(i) SONAR

(ii) Radar

(iii) F.M. Radio

(iv) Satellite Communication (See Lesson -30)

5. Answer any one of the following questions in 100-150 words.

a) You are provided with two identical looking spheres A and B having equal masses and radii made of different materials. Actually one of them is a solid sphere and the other is a spherical shell. Suggest an experiment to find out which of the two is hallow from within. Give reason in support of your answer.

b) Can the affective utilization of solar energy solve our energy problem? Giving numerical calculations answer this question. In your calculations you can use the data given below:

Solar constant for earth = 1.36x103 w m-2

Radius of birth = 6.4x10-8m

Stefan Boltzmann Constant = 5.7x10-8 w m-1 k-4

Temperatures of the Surface of Sun = 6000 k

Radius of sun = 7x105 km

Radius of the orbit of earth = 1.5 x102 km

Population of earth = 10 billion  (See Lesson -12)

6. Prepare any one project as given below.

a) Take a rubber string fix its one end to a rigid support and attach a light scale pan on its lower end. Attach a pointer just above the pan which may move freely against a vertical scale. Add weight on the pan in steps of 10g and note the position of the pointers in each case. Take 5-6 readings .Note the position of the pointers again while removing weights from the pan. Tabulate the data and draw case of load increasing as well as load decreasing on the same graph. Repeat the experiment using a spring in place of rubber string. Compare the graph obtained in the two cases.

b) Kinetic Theory of gases provides us the equation p=1/3 m nc² using this equation derives the following laws:

1. Boyle’s Law

2. Chari’s Law

3. Gay-Lussac’s Law

4. Avogadro’s Law

5. Daltons Law of partial pressures

6. Graham’s Law of diffusion 

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