Define electric field at a point. Give its unit and obtain an expression for the electric field at a point due to a point charge.

Asked by tejan Pillai | 21st May, 2013, 11:55: AM

Expert Answer:

Electric field is defined as the electric force per unit charge. The direction of the field is taken to be the direction of the force it would exert on a positive test charge. The electric field is radially outward from a positive charge and radially in toward a negative point charge.
 
Unit for electric field is N/C (newton per coulomb) or V/m (volts per meter).
 
E = Q/4pi*e0*r 

Answered by  | 22nd May, 2013, 08:20: AM

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