Formulas in Physics Chapter Electricity:

Electric current (I) = Q/t

Potential difference (V) = W/Q

Ohm's law: V = IR

Resistance (R) = V/I

Power (P) = IV

Energy (E) = Pt

Explanation:

Electric current: Electric current is the flow of electric charges, and it is measured in amperes (A). The amount of electric charge (Q) flowing through a conductor in a given time (t) is called electric current (I).

Potential difference: The potential difference (V) between two points is defined as the work done per unit charge in moving a charge from one point to another. It is measured in volts (V).

Ohm's law: Ohm's law states that the potential difference (V) across a conductor is directly proportional to the current (I) flowing through it, provided the temperature and other physical conditions remain constant. The constant of proportionality is called resistance (R).

Resistance: Resistance is defined as the property of a material that opposes the flow of electric current through it. It is measured in ohms (Ω). The resistance of a conductor is directly proportional to its length (l) and inversely proportional to its cross-sectional area (A).

Power: Power is the rate at which work is done or energy is transferred. It is measured in watts (W). The power (P) consumed by a device is given by the product of its current (I) and potential difference (V).

Energy: Energy is the capacity of a system to do work. It is measured in joules (J). The energy (E) consumed by a device is given by the product of its power (P) and time (t).

These formulas are essential in solving numerical problems related to electric circuits.