NEET Questions Solved


 

The electric potential at the surface of a charged solid sphere of insulator is 20V. The value of electric potential at its centre will be

1.  30V

2.  20V

3.  40V

4.  Zero

Concept Videos :-

#2 | Defining Electric Potential
#3 | Potential Due to Point Charge
#4 | Potential Due to Multiple Charges
#5 | Electric Potential due to Dipole
#6 | Electric Potential due to Charge System
#29 - Derivation: Electric Potential due to Dipole

Concept Questions :-

Electric potential

(1)

For a solid charged non-conducting sphere, for an inside point at distance r from center

V=kQ2R3(3R2-r2)At center, r=0Vcenter=3kQ2R

At surface r=R, Vs=kQR Vcenter=3Vs2                   =32X20 = 30V

Difficulty Level:

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