Question

What is the potential difference ΔV_AB? What is the potential difference ΔV_BC ?

Answer 1

The points A and B are at the same distance from charge q Hence, potential at A and B are same. The potential due to a point charge at a distance r is given byV Here, 9x10 N2/ 4πε0 q=2.0 nC = 20 x 10-9 C , r1.0 cm 1.0x10 m Hence, V, -V2910 Nmc 9 . 22 1.0xl0-2m -1800 V Adjusted to two significant figures, Vs For Cr= 2.0 cm= 2.0×10-2 m, Hence, -B 1800 V

2.0x10-9 o 2.ox10-2m = 900 V Adjusted to two significant figures, Vc- 900 V a As A and B are at same potential, Hence, potential difference between A and B is AB b) Potential Difference between the points B and C is 1800-900 -900 V Adjusted to two significant figures, Ac 900 V