The potential at a point P due to a charge of 4 × 10–7 C located 9 cm away is:
The potential at point P is . The work done in bringing a charge of 2 × 10–9 C from infinity to the point P is:
Two charges 3 × 10–8 C and –2 × 10–8 C are located 15 cm apart. At what point on the line joining the two charges is the electric potential zero? Take the potential at infinity to be zero.
1. 9 cm away from 3 × 10–8 C
2. 25 cm away from 3 × 10–8 C
3. 45 cm away from 3 × 10–8 C
4. Both (1) and (3)
Figures (a) and (b) show the field lines of a positive and negative point charge respectively.
The signs of the potential difference