Posts Tagged ‘law’

What are the similarities and differences in magnetic and electric field?

Similarities and differences in magnetic and electric field (Dilpreet posted this question) Similarities Differences  Both electric and magnetic field are conservative forcesBoth obey inverse square law Both are non contact forces (Forces can be exert...

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Be the first to comment - What do you think?  Posted by Mathew Abraham - September 16, 2011 at 5:13 am

Categories: Ask Physics, conservative forces, inverse square law, Project, Similarities, similarities differences   Tags: , , , , , , , , , , , , , , , , ,

Gravitation – Questionbank with answer for CBSE Class 9 SA1

The following questions are for a quick revision of the chapter “Gravitation” for CBSE Class 9. There are many other questions which can be asked from the portion allotted for SA1, but will mainly based on these concepts. The questions are based on the bare essential concepts; the minimum level of learning expected from the [...]

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Be the first to comment - What do you think?  Posted by Mathew Abraham - September 2, 2011 at 9:12 am

Categories: Ask Physics, falling to earth, gravitation states, law of gravitation, Project, questionbank, universal law of gravitation   Tags: , , , , , , , , , , , , , ,

Do the super conductors obey the second law of thermodynamics?

Second law of thermodynamics is not violated. If you can illustrate your idea and doubt, we may be able to discuss in more detail.

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Be the first to comment - What do you think?  Posted by Mathew Abraham - August 20, 2011 at 1:48 pm

Categories: Ask Physics   Tags: , , , , , ,

Is law of conservation of energy violated here?

“When a body is moving with uniform speed on a rough surface under the application of a constant external force and an equal and opposite frictional force, the work done by both the forces should be equal. as a result, the net work done by both the forces should be zero. however, we find that [...]

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Be the first to comment - What do you think?  Posted by Mathew Abraham - August 14, 2011 at 2:21 pm

Categories: Ask Physics   Tags: , , , , , , , , ,

Electrostatics (I) Question Bank

Electrostatics I (Based on Frictional electricity, , Conservation of charge, Quantization of charge, Coulomb’s law and principle of superposition) Very Short Answer type Questions (1 mark) What is frictional electricity? What is the cause of frictional electricity? What is electrostatics? Write two devices based on electrostatics. Why static electricity is called so? How did electricity [...]

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Be the first to comment - What do you think?  Posted by CBSE Physics :: A Web Resource in Physics - July 22, 2011 at 6:40 pm

Categories: Question Bank   Tags: , , , , , , , , ,

What is refractive index?

Refractive index of a substance is a measure of the relative speed of light through that substance. It tells us by what fraction light is slowed down in the medium. Refractive index = speed of light in vacuum /speed of light in the medium Snell’s law...

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Be the first to comment - What do you think?  Posted by Anne - July 7, 2011 at 6:27 pm

Categories: Physics Homework   Tags: , , , ,

Class IX Physics :: Question Bank on Force and Laws of Motion

Very Short Answer Questions What name is given to the product of mass and velocity? What is the SI unit of momentum? What is the other name for Newton's first law of motion?

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Be the first to comment - What do you think?  Posted by Anne - May 23, 2011 at 4:54 pm

Categories: Physics Homework   Tags: , , , ,

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