1. what is meant by the statement,"Potentialdifference between two points A and B in an electric field is 1 volt"? 
  2. The flow of a current in a circular loop of wire creates a magnetic field at its centre.How many existence of the field can be detected?State the rule which helps to predict the directionof this magnetic field.
  3. Give reasons:Metals conduct electricity.
  4. What is the usual capacity of the fuse wire in the line to feed:(a)lights and fans?(b)appliances of 2kW or more power?

Asked by qulendra | 7th Sep, 2015, 12:31: PM

Expert Answer:

1. The potential difference between two points A and B in an electric field is 1 V means that in order to move a charge of 1 C from A to B, a work of 1 J has to be done on the charge.
 
W = qV
 
Therefore, V = W/q
 
So, 1 V = 1 J/1 C
 
NOTE: Kindly post other questions as separate queries.

Answered by Romal Bhansali | 7th Sep, 2015, 01:53: PM

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