Assignment 1. (a) Define the following.
(i) electromotive force (ii) internal resistance of a cell (iii) lost volt (iv) electrical charge (v) potential difference (vi) electrical resistance
(b) State Ohm's law.
(c) State what the following units measure. (i) volt (ii) ampere (iii) ohm
(d) What instrument is used to measure each of the following? (i) current (ii) voltage (iii) electromotive force
2. (a) Derive an expression for the resistance of three conductors connected in (i) series (ii)parallel
(b) A cell has an e. m.f of 2.0 V and internal resistance of 1.5 ohm and is connected to two resistance 3 and 4 ohms in series. Find the current flowing and potential difference across the ends of each resistor.