Guidelines for Intermediate Physics Practicals

As the marks scored in Intermediate decides the EAMCET rank, it is necessary to score more marks in practical exam. There need not be any tension while doing a Physics experiment. The theoretical back-ground, practical skill and honesty are the three important factors.

Scheme of Valuation: Intermediate board issued the following guidelines for evaluating practical answer script.
Topic Marks allotted
Formula and Procedure 5 (2+3)
Tabular forms, Observations
and Graph 8 (2 + 4 + 2)
Calculations, Result, Units 6 (4 + 1 + 1)
Precautions 2
Viva-Voce 5
Record 4

There is a chance of scoring atleast pass marks (11) without performing the experiment. By writing necessary Formula, Procedure,
Tables, Units and Precautions related to the question and by submitting record with all entries, a student can score 14 marks.

Flawless observations, perfect calculations fetch 25 marks. If a student answers viva questions in a fair manner then he or she can get thirty out of thirty.

Pattern of Questions: Board prescribed 45 questions for twenty practicals of Intermediate Syllabus. The Question bank is further categorized into six parts. (See Table – 2)

Only one question is allotted, from a Sealed Question paper containing twelve questions, based on a lottery system.

What to do: Along with necessary accessories reach the centre atleast half an hour before the time scheduled. Write the dictated/allotted question on the top of the first page of the main
answer book. Take a time period of 45 minutes to write formula, procedure and other things before starting the experiment with necessary side headings. Check whether the given apparatus
functioning properly or not.

Formula: Write the formula related to the question only, not all the formulae connected to the experiment. Name the parameters of the equation along with their proper units.
There are certain questions like h,1/ l graph, L-T2 graph, for which there is no particular formula. For, such questions write the necessary definitions and other things that are to be derived from the graphs.

Procedure: Write 10 to 15 sentences to describe the way in which you perform the experiment. Draw necessary circuit diagrams to explain the experiments related to Electricity. Avoid writing aim, apparatus, description under procedure.

Tables: Draw necessary tables with Scale and Pencil. Draw them either vertically or horizontally depending on the no. of columns
Horizontal tables are advisable for Inclined plane, Boyle’s Law and deflection magnetometer experiment.

Observation: Recording the observation is the important task of the exam. Readings without errors lead to the exact result. So, it is necessary to take the readings with lot of concentration.

Recording tampered with observations, pre determined readings are not advisable. If it is insisted to record six readings, then take six readings otherwise take the readings in accordance with the situation demands.

Graph: Plot a graph by taking the obtained values on Y – axis and varied values on X – axis. Take necessary units along the axis so as to inscribe the curve within the page. Indicate scale on the top right of the graph sheet. Some experiments with straight lines (such as l, T2 graph) require the calculation of slope for final calculation.For such experiments, Take any two rbitrary points on the line to find the slope with y2 – y1 the formula
Neglect erratic points of the graph while smoothening the curve.

Calculation: Use logarithm tables to calculate the measurement in a separate page of the answer book. Final result should be recorded
with its proper units.

Units: All the measurements should be taken in a same system of units. Clubbing of CGS and SI units in the process of deriving the result leads to the chaos.

Important points: ● Take an additional sheet for Prism and for mapping of magnetic lines of force experiments.
● The concerned lecturer supplies the values of linear densities of wires in Sonometer, moment of inertia of the brass block in vibration
magnetometer and density of the object in the physical balance
experiments respectively.
● Write atleast two valid precautions.
● No need to use extra top key in electricity experiments, as the circuit remains broken when jockey in meterbridge experiment, pair
of keys in commutator are not intact, in experiments related to Tangent Galvanometer.
● Viva-voce may be based on the text book topics related to the experiment given.
● Check the Answer script once or twice before handing over it to the examiner. Remember to attach additional/ graph papers to the
answer script.
● Proper dressing, obedience and honesty create a good impression.