# Fizica Particulelor

The CBSE Class 11 Physics practical work would be conducted for 30 points which would be added to a student’s final mark in the 2022-2023 CBSE Class 11 Physics Annual Examination. Therefore, students should take the practical part seriously so that they can improve their overall grades. They must know the practical program and the evaluation scheme and must learn the step-by-step procedure for carrying out all the experiments mentioned in the program below. Students can view and download the CBSE Class 11 Physics Syllabus 2022-2023 in PDF.

Check CBSE Class 11 Practical program 2022-2023 below:

PRACTICE (Total number of periods: 60)

The file, to be submitted by the students during their annual exam, must include:

• Recording of at least 8 experiments [with 4 from each section]to be done by the students.
• Recording of at least 6 activities [with 3 each from section A and section B]to be done by the students.
• Report of the project carried out by the students

EVALUATION SCHEME

 Time 3 hours Max. Dots: 30 Topic Brands Two experiments one from each section 7+7 Practical file (experience and activities) 5 An activity from any section 3 Investigative project 3 Viva on experiences, activities and the project 5 Total 30

SECTION–A

Experiences

1. To measure the diameter of a small spherical/cylindrical body and to measure the internal diameter and depth of a given beaker/calorimeter using a caliper and thereby find its volume.

2. To measure the diameter of a given wire and the thickness of a given sheet using a screw gauge.

3. To determine the volume of an irregular blade using a screw gauge.

4. Determine the radius of curvature of a spherical surface given by a spherometer.

5. Determine the mass of two different objects using a beam balance.

6. Find the weight of a given body using the law of parallelogram vectors.

7. Using a simple pendulum, plot its LT2 graph and use it to find the effective length of a second’s pendulum.

8. Study the variation of the period of a simple pendulum of a given length by taking balls of the same size but of different masses and interpret the result.

9. Investigate the relationship between limit friction force and normal reaction and find the coefficient of friction between a block and a horizontal surface.

10. Find the downward force along an inclined plane acting on a roller due to the earth’s gravitational pull and investigate its relation to the angle of inclination θ by drawing a graph between the force and Sinθ.

Activities

1. Make a paper scale of a given minimum number, for example 0.2 cm, 0.5 cm.

2. Determine the mass of a given body using a metric scale according to the principle of moments.

3. Plot a graph for a given set of data, with an appropriate choice of scales and error bars.

4. Measure the limit frictional force for rolling a roller on a horizontal plane.

5. Study the variation in range of a projectile with the angle of projection.

6. Study the conservation of energy of a ball rolling on an inclined plane (using a double inclined plane).

7. Investigate the energy dissipation of a simple pendulum by plotting a graph between the square of the amplitude and the time.

SECTION-B

Experiences

1. Determine the Young’s Modulus of Elasticity for a given yarn material.

2. Find the force constant of a coil spring by plotting a graph between load and extension.

3. Study the variation of volume with pressure for a sample of air at constant temperature by plotting curves between P and V, and between P and 1/V.

4. Determine the surface tension of water by the capillary rise method.

5. Determine the coefficient of viscosity of a given viscous liquid by measuring the terminal velocity of a given spherical body.

6. Investigate the relationship between the temperature of a hot body and time by plotting a cooling curve.

7. Determine the specific heat capacity of a given solid by the method of mixtures.

8. Investigate the relationship between frequency and length of a given wire under constant tension using a sound level meter.

9. Investigate the relationship between the length of a given wire and the voltage at constant frequency using a sound level meter.

10. Find the speed of sound in air at room temperature using a resonance tube by two resonance positions.

Activities

1. Observe the change of state and plot a cooling curve for the molten wax.

2. Observe and explain the effect of heating on a bimetallic strip.

3. Note the change in level of liquid in a container on heating and interpret the observations.

4. Study the effect of detergent on the surface tension of water by observing capillary rise.

5. Investigate the factors affecting the rate of heat loss from a liquid.

6. Investigate the effect of load on the vacuum of a suitably fixed meter scale loaded at (i) its end (ii) in the middle.

7. Observe the decrease in pressure with increasing velocity of a fluid.

Practical exam for visually impaired students

Class XI

Note: The same assessment scheme and general guidelines for visually impaired students as given for Class XII can be followed.

A. Elements of identification/familiarity of the device for evaluation in practical work (Allexperiments)

Spherical ball, cylindrical objects, vernier calipers, beaker, calorimeter, screw gauge, wire, beam balance, spring balance, weight box, gram and milligram weights, forceps, vector parallelogram apparatus, pulleys and trays used in the same “weights” used, Bob and rope used in a simple pendulum, meter scale, split cork, suspension arrangement, stopwatch/stopwatch, coil spring, suspension arrangement used, weights, arrangement used to measure l ‘extension, sound level meter, wedges, pan and pulley used in it, ‘weight’ tuning fork, metric scale, beam balance, weight box, gram and milligram weights, forceps, resonance tube, tuning fork, metric scale, flask/beaker used to add water.

B.List of practical work

1. To measure the diameter of a small spherical/cylindrical body using a vernier caliper.

2. Measure the internal diameter and depth of a given beaker/calorimeter using a caliper and thus find its volume.

3. To measure the diameter of a given wire using a screw gauge.

4. To measure the thickness of a given sheet using a screw gauge.

5. Determine the mass of a given object using a beam balance.

6. Find the weight of a given body using the law of parallelogram vectors.

7. Using a simple LT and LT pendulum diagram2 graphics. So find the effective length of the second’s pendulum using the appropriate length values.

8. Find the force constant for a given coil spring by plotting a graph between load and extension.

9. (i) Investigate the relationship between frequency and length of a given wire under constant tension using a sound level meter.

(ii) Investigate the relationship between the length of a given wire and the voltage, at constant frequency, using a sound level meter.

10. Find the speed of sound in air, at room temperature, using a resonance tube, observing the two resonance positions.

To note: The above hands-on can be done experimentally rather than recording observations.

Prescribed books: