Electric current is the flow of a charge. The electric current can be positive, negative, or neutral, or any combination of the two. They can carry protons, neutrons, or electrons.
Electric current is defined as the flow of electric charges. Mathematically, it is given by :
Where
q = electric charge
t = time interval
The SI unit of electric current is ampere. It is denoted by letter A. According to Ohm's law, electric current can be given by voltage divided by resistance of the circuit. Hence, the correct option is (c) " Electric current is the flow of a charge ".
According to the law of conservation of energy, the potential energy is converted to kinetic energy. Remember, potential energy is calculated using height and weight. If the ball is on the ground, height is 0.