Understanding the Concept of Coulombs

What is the base unit of electric charge in the metric system?

• Ampere

• Coulomb

• Volt

• Ohm

How is one ampere of current related to charge?

• One ampere equals one volt per second

• One ampere equals one watt per second

• One ampere equals one Coulomb per second

• One ampere equals one ohm per second

What is the symbol used to represent charge in equations?

• I

• C

• E

• Q

What is the elementary charge of an electron?

• 1.6 x 10^-6 Coulombs

• 1.6 x 10^-12 Coulombs

• 1.6 x 10^-9 Coulombs

• 1.6 x 10^-19 Coulombs

How many electrons make up one Coulomb of charge?

• 6.2 x 10^18 electrons

• 6.2 x 10^19 electrons

• 6.2 x 10^16 electrons

• 6.2 x 10^17 electrons

What is the charge of a proton?

• 1.6 x 10^-9 Coulombs

• -1.6 x 10^-19 Coulombs

• 1.6 x 10^-19 Coulombs

• -1.6 x 10^-9 Coulombs

If a body gains a charge of -0.35 microCoulombs, how many electrons has it gained?

• 2.2 x 10^12 electrons

• 2.2 x 10^11 electrons

• 2.2 x 10^10 electrons

• 2.2 x 10^13 electrons

What is the charge on a glass rod after transferring 2.0 x 10^17 electrons to rabbit fur?

• 3.2 x 10^-4 Coulombs

• 3.2 x 10^-3 Coulombs

• 3.2 x 10^-1 Coulombs

• 3.2 x 10^-2 Coulombs

What does the prefix 'milli' represent in terms of Coulombs?

• 10^-12 Coulombs

• 10^-9 Coulombs

• 10^-6 Coulombs

• 10^-3 Coulombs

Which of the following is the correct representation for microCoulombs?

• MC

• mC

• μC

• nC