Physics · Current Electricity

Consider the following statements regarding Ohm's law: (a) Ohm's law states that at constant temperature and physical conditions, the potential difference across a conductor is directly proportional to the current flowing through it. (b) The vector form of Ohm's law is E = ρ j, where E is the electric field, ρ is the resistivity, and j is the current density. (c) Semiconductors do not obey Ohm's law. (d) The vector form of Ohm's law is E = σ j, where σ is the conductivity. Choose the correct statement(s) from the options given below: