What is the basic unit of electrical quantity?

What is the basic unit of electrical quantity?

• A. Volt
• B. Coulomb
• C. Ampere
• D. Ohm

Answer: (B)

Electric charge is the quantity being measured here, and its unit is the coulomb. The coulomb quantifies how much charge is present. A practical way to see it: a current of 1 ampere flowing for 1 second transfers 1 coulomb of charge, since current is the rate of charge flow (1 A = 1 C per second). The other units describe related ideas—volts measure electrical potential difference (the push that moves charge), ohms measure resistance (how much a material resists the flow), and amperes measure the flow rate itself. So for the basic quantity of electric charge, the coulomb is the correct unit. One coulomb equals about 6.24×10^18 elementary charges (electrons or protons).

Electric charge is the quantity being measured here, and its unit is the coulomb. The coulomb quantifies how much charge is present. A practical way to see it: a current of 1 ampere flowing for 1 second transfers 1 coulomb of charge, since current is the rate of charge flow (1 A = 1 C per second). The other units describe related ideas—volts measure electrical potential difference (the push that moves charge), ohms measure resistance (how much a material resists the flow), and amperes measure the flow rate itself. So for the basic quantity of electric charge, the coulomb is the correct unit. One coulomb equals about 6.24×10^18 elementary charges (electrons or protons).