(i) State Coulomb’s law and define the unit of charge. (ii) State and explain Ohm’s law.

(i) Coulomb's law states that the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. Mathematically, it can be represented as: F = kQ1Q2/r^2 where F is the force between the charges, k is the Coulomb's constant, Q1 and Q2 are the charges of the particles, and r is the distance between them. The unit of charge is coulomb (C), which is defined as the amount of electric charge that flows through a conductor in one second when a current of one ampere is applied. (ii) Ohm's law states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points, given a constant temperature and other physical conditions. Mathematically, it can be represented as: I = V/R where I is the current flowing through the conductor in amperes (A), V is the voltage across the two points in volts (V), and R is the resistance of the conductor in ohms (?). In simpler terms, this law implies that the more voltage you apply across a resistor or conductor, the more current will flow through it, given its resistance remains constant. Similarly, if you increase the resistance, the current will decrease for the same voltage.