Monthly Archives: June 2011

What is resistance and reason for it?

You must have knowledge of current. As current is the charge per unit time. Resistance is the obstruction offered to the flow of current. Reason: As charge (electrons) flow through the wire (conductor), electrons collide with the walls of the … Continue reading

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IAS preliminary exam new pattern

Many of us want to appear in the prestigious exam and one of the most difficult exam called “civil services”. Let us discuss about it: To clear civil services, one has to pass to three steps: a) Preliminary exam b) … Continue reading

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Shaheed Bhagat Singh college of Engineering and technology Ferozepur

Name of the Institute: Shaheed  Bhagat Singh College of Engineering & Technology is situated in the city Ferozepur (Punjab) of India. Affiliated with: Punjab Technical University (PTU), Kapurthala Approved by: All India Council for Technical Education (AICTE), New Delhi. Courses … Continue reading

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Non polar dielectrics

In the last article, I have discussed the dielectrics and polar dielectrics. Today let us discuss the non-polar dielectrics: Non-polar Dielectrics or Molecules.  If  the  centre of gravity of  positive charges  coincides  with the centre of gravity of negative charges … Continue reading

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Dielectrics and their types

DIELECTRICS Dielectrics are the materials which do not contain free charges for conduction. Thus, dielectrics are basically insulators as insulators do not conduct electricity through them. But, dielectrics, contain positive and negative charges which are bounded  together and these charges … Continue reading

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Electric Field Intensity Due To A Point Charge

Electric Field Intensity Due To A Point Charge Suppose we have to calculate electric field intensity at any point P due to a point charge q at O, where OP= r. Consider a small positive test charge q0> at P. … Continue reading

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ELECTRIC FIELD INTENSITY

ELECTRIC FIELD INTENSITY It is defined at any point as the force experienced by unit positive charge placed at that point. The electric field intensity at any point is the strength of electric field at that point. If F  is … Continue reading

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Retired but not yet tired

The writer is a retired Major General …not retired from life..just retired from his post. Currently employed with TATA’s as an Advisor and also writes for various magazines mainly on the national security . 1.      Retirement from service in our … Continue reading

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Coulomb’s law and its limitations

COULOMB’S LAW Statement. The force of interaction between two stationary point charges q1 and q2 is directly proportional to the product of the charges and inversely proportional to the square of the distance r between them. That is, F α … Continue reading

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CHARGE DISTRIBUTIONS

CHARGE DISTRIBUTIONS There are three types of charge distributions : a) Linear Charge Distribution. In this distribution the charge is distributed uniformly along a line in a straight line or circumference of a circle. This is represented by λ, the … Continue reading

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