Question

The quantity of charge flowing per unit time is called ____
(A) Capacitance
(B) Charge density
(C) Current
(D) Potential difference

Answer 1

Hint: To solve this question, we have to look into the basic definition of each of the quantities given in the options. Then, matching them with the definition given in the question, we can eliminate all the incorrect options and get the correct answer.

Complete step by step answer
The capacitance is defined as the charge carried by a conductor per unit voltage which is applied across it. So the capacitance is equal to the quantity of charge per unit voltage, and not per unit time.
Hence, the option A is incorrect.
Now, the charge density is defined as the charge stored by a conductor per unit of its surface area. So the charge density is equal to the quantity of charge per unit surface area, and not time.
Hence, the option B is also incorrect.
The potential difference between two points is defined as the work done to move a unit positive charge from one point to the other point with a constant speed. So the potential difference is related to the work done, and not to the rate of flow of charge.
Hence, option D is also incorrect.
The electric current is defined as the amount of charge crossing through a cross section of a conductor per unit time. So the quantity of charge flowing per unit time is called the current.

Hence, the correct answer is option C.

Note
The above question could also be attempted by comparing the units of the quantities given in the options with the units of the quantity of charge flowing per unit time. The quantity whose units match with the latter would be the correct answer.