1. While analyzing a circuit, the internal resistance of e.m.f. sources are ignored. Why?
2. Under what circumstances can the terminal P.D. of a battery exceed its e.m.f.?
3. What is the difference between an e.m.f. and a P.D.?
4. Is every emf a potential difference? Is every potential difference an emf?
5. How much charge flow in pocket calculator each minute when the current is 0.0001A?
6. Relationship between potential differences and electric potential energy.
7. How can electric potential be high when the electric potential energy be low?
8. Will energy be stored in capacitors series vs parallel which one is greater?
9. How can you increase capacitance of capacitors?
10. Can equipotential lines cross each other?
11. . When Wheatstone Bridge is balanced, then no current flows through the galvanometer, why?
Numerical Problems:
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Charges 2C, -3C, 4C at vertices of equilateral triangle (side 10cm). Find force on 4µC.
Two charges 15e-10 C and 13e-10 C, 12cm apart. Find work done to bring 4cm closer.
E=26 N/C, V=13 J/C at a point due to point charge. Find distance and charge.
Two point charges of 8µC and -4µC are separated by a distance of 10cm in air. At what point on the
line joining the two charges is the electric potential zero? (Answer 6.6 cm from 8µC and, 3.3 cm from
–4µC charge).
5. Find the charge on the 5µF capacitor in the circuit shown in Fig.