Magnetic Lines of Forces

Curved lines used to represent a magnetic field, drawn such that the number of lines relates to the magnetic field's strength at a given point and the tangent of any curve at a particular point is along the direction of magnetic force at that point.

The direction of the field is always north to south while in a solenoid we observe the same phenomena but in more detail.

pressure in liquids, solids and gases

Pressure:

Pressure is the amount of force acting per unit area. The symbol for it is p or P

• Pressure inside liquids are due to the random movement of the liquid molecules and the weight of the liquid. The pressure inside solids occurs only due to the weight of the solid.

•  The liquid pressure acts on the sides of the liquid as well as the bottom. The pressure due to solids only appears at the bottom of the solid.

I will suggest the following videos by TED.Ed on www.youtube.com. Links are given below

https://www.youtube.com/watch?v=EkDhlzA-lwI

https://www.youtube.com/watch?v=VDf00z8sMFw

I hope you would find it helpful.

Welcome Back after winter break

Dear Students and all readers you are all welcomed back for the support in content for the 2nd term of session 20116-17.

Regards