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CBSE Class 12 Physics Board Exam: 

10 common mistakes students make pointed out by Board examiner

The CBSE Class 12 Board exams 2018 begin March 5 and students from the science stream all over India will be sitting for the Physics paper on March 7.
India Today got talking to Shampa Chakraborty, senior Physics teacher at Hariyana Vidya Mandir school, Kolkata, with 20 years of teaching experience, and an experienced Board examiner, who pointed out the silly errors students make which Board examiners cut marks for. Most of these errors have absolutely nothing to do with your knowledge of the subject and can easily be avoided.

Here are 10 common errors you can easily avoid in your CBSE Class 12 Physics paper:

1

The answer length Class 12 CBSE Physics Board exam should be in accordance to the marks provided for the question. A question of 1 mark should not be answered in half a page or a whole page.

2

Even good students at times do not write the formula when doing numericals. However, marks are allotted for the formula itself and not writing the formula will make you lose marks.

3

Students often flip the numerator and denominator in formulae by mistake. This makes sure that the entire working of the numerical problem is incorrect and you get absolutely no marks for the answer.

4

An extremely common mistake students make in the Class 12 CBSE Physics Board exam is in the formula for finding capacitance in series. The formula is: 1/c= 1/c1 + 1/c2. However, students commonly write: c= 1/c1 + 1/c2

5

In value-based questions, which are generally of 2 marks, students tend to write only one sentence. They ought to write 3-4 sentences in order to get full marks.

6

For questions where diagrams are asked for, students should label them properly and preferably, in pencil.

7

In the Class 12 CBSE Physics Board exam, m ost questions have several parts in it, and each part is allocated some marks. Students often tend to overlook or miss out on a small part of the question, thus losing anything from half a mark to 3 marks for the same.

8

In questions of 1 mark which are asking for a "yes" or "no" answer, students should write the reason for the "yes" or "no" as well in order to get full marks. Most of the time, such questions are allocated a half mark each for the two parts of the answer.

9

Students should make sure they write the correct question number for the answer they are writing. Any mistake here means they would lose the entire marks even if their answer is correct.

10

Students often re-write certain questions. In that case, they MUST make sure that you strike out the first answer. If that isn't done, CBSE rules ask examiners to accept the first attempt and ignore the second attempt.

Prepare well for your Class 12 CBSE Physics Board exam, and make sure you do not make these silly errors in your exam hall to avoid losing marks even when you know the answers.All the best!

Source : https://www.indiatoday.in/education-today/tips-and-tricks/story/cbse-class-12-physics-common-mistakes-told-by-board-examiner-html-1173559-2018-02-20