Two concentric, thin metallic spherical shells of radii R1andR2(R1>R2) bear charges Q1 andQ2 respectively. Then the potential at radius ‘r’ between R1 and R2will be 4πϵ01 times
Four chargers q1=−0.02μC, q2=+0.04μC, q3=+0.02μC, and q4=−0.04μC are at the four corners of a square of side 9cm . Then the potential at the centre of the square is :
Two point charges q1=2μC and q2=1μC are placed at distances b=1cm and a=2cm from the origin on the y and x axes as shown in figure. The electric field vector at point (a,b) will subtend an angle θ with the x - axis given by :
The potential at the origin is zero due to electric field Eˉ=20i^+30j^NC−1 . The potential at point P(2m,2m) is:
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