CBSE Class 12-science Answered
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 | 21 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 | 22 May, 2013, 08:20: AM
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