What is the resistance of a 20-watt tungsten lamp if the e.m.f. is 115 volts?
Electromotive force is another name for pressure; the symbol for which is e.m.f.
What is the resistance of a circuit carrying 22 amperes, if the e.m.f. is 20 volts?
A galvanometer is connected in series with a standard high resistance and a steady source of e.m.f.
What current flows through a circuit if its e.m.f. is 110 volts and the resistance is 220 ohms?
If each lamp when hot has a resistance of 220 ohms, and the e.m.f. is 100 volts, what current will flow?
Would you expect to get an e.m.f. by forming a cell of two copper plates?