Monthly Archive: September 2011

Sep 24

Eating food during Eclipse

I heard that we ought not eat anything in eclipse hours. Is there any scientific reason for that?

Tejaswini  asked

Answer:

There is no scientific reason behind it. Earlier it was thought that more harmful

read more

Permanent link to this article: http://www.plustwophysics.com/eating-food-during-eclipse/

Sep 17

CBSE 12th Std Physics Numerical from Optics

A convex lens of crown glass(1.5) has a focal length of 15 cm. The lens is placed in (a) water(1.33) and carbon bisulphide(1,65).determine in each case whether the lens behaves as a conveging or a diverging

read more

Permanent link to this article: http://www.plustwophysics.com/cbse-12th-std-physics-numerical-from-optics/

Sep 17

CBSE Physics MCQ for quick revision – Mechanics

  • If the object is in equilibrium, the sum of all the forces acting on the object is zero.
    1. Inertia
    2. Force
    3. Mechanical Equilibrium
    4. Equilibrium rule

A push or a pull on an

read more

Permanent link to this article: http://www.plustwophysics.com/cbse-physics-mcq-for-quick-revision-mechanics/

Sep 17

Class XI CBSE – Revision Questions MCQ – Semester 1

  1. What is the gravitational field strength of a planet when the weight of a 100 kg astronaut is 400 N?

a)      ¼ N kg-1   b) 9.8 N kg-1 c) 4 N kg-1  d) infinity

  1. The only natural satellite of the earth complete orbits in about

a)      24 days b) 27.3 days c) 30 days d) 365 1/4 days

  1. The satellite that revolves in a polar orbit is called

a) Natural Satellite b) Geostationary satellite   c) Polar

read more

Permanent link to this article: http://www.plustwophysics.com/class-xi-cbse-revision-questions-mcq-semester-1/

Sep 16

Latest News from the Physics World

Permanent link to this article: http://www.plustwophysics.com/latest-news-from-the-physics-world/

Sep 16

Rotational motion – Flywheel problem

Permanent link to this article: http://www.plustwophysics.com/rotational-motion-flywheel-problem/

Sep 16

Motion of connected system – A Numerical problem

A mass 5kg descending vertically,draws up a mass of3kg by means of a light string passing over a pulley.At the end of 4 seconds,the string breaks.How much higher 3 kg mass would go?

Post your solutions

read more

Permanent link to this article: http://www.plustwophysics.com/motion-of-connected-system-a-numerical-problem/

Older posts «

%d bloggers like this: