Tag Archive: point

Nov 15

CLASS XII – PHYSICS Sample Paper II

CLASS XII – PHYSICS

Sample Paper

Time allowed : 3 hours

Max. Marks : 70

General Instructions:

  1. All questions are compulsory
  2. There are 30 questions in total. Questions 1 to 8 carry one mark each, 9 to 18 carry two marks each, 19 to 27 carry 3 marks each and 28 to 30 carry 5 marks each.
  3. There is no overall choice, but internal choices are provided. You have to attempt only one choice in full.
  4. Use of calculator is not permitted.
  5. You may use the logarithm table, if required.

1. What is electrostatic shielding?

2. Identify the carbon resistor whose colour code is green, blue, red and gold.

3. Energy of a charged particle moving in a magnetic field does not change. Why?

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Nov 05

A problem from Optics

A convergent beam of light passes through a diverging lens of focal length 0.2m and comes to focus at distance 0.3m behind the lens.Find the position of the point at which the beam would converge in

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Oct 12

A Numerical Problem – Kinamatics

A particle is thrown vertically upward with a velocity of 19.6 m/s. Find (a) the acceleration of the particle at the highest point. (b) How high the particle will rise? (c) Time taken for rising to

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Sep 14

Jaz posted this question from electrostatics

“I’ve tried so many times, but I’m unable to arrive at the correct equation; See attachment for question” Question   Jaz posted this question E=k(2λ/r) due to positive wire E’=k(2λ/(D-r)) due to negative wire The r...

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Aug 04

What will be the zero spot in electric field lines of 2 opposite charges?

Taha asked this question - what will be the zero spot in electric field lines of 2 opposite charges?” Answer: I think the question is about null point. When the charges are of opposite sign, the null point (also called neutral point) is not in between the two charges, but is outside the line joining the [...]

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