Understanding Current, Coulomb, and Voltage

What is the condition for current to be present between two points?

• There must be no charges.

• Charges must be stationary at both points.

• Charges must be in motion.

• Charges must be at rest.

How many electrons are approximately in one coulomb?

• 12 electrons

• 6.24 x 10^18 electrons

• 3.6 x 10^19 electrons

• 1.5 x 10^18 electrons

What is the formula for calculating current?

• I = t / Q

• I = Q x t

• I = Q / t

• I = Q + t

What does the SI unit 'ampere' measure?

• Charge

• Current

• Resistance

• Voltage

What is voltage defined as?

• The energy per unit charge between two points

• The total energy between two points

• The current per unit charge between two points

• The resistance per unit charge between two points

What happens to a ball when it is released from a high potential region?

• It moves to a higher potential region.

• It gains potential energy.

• It remains stationary.

• It moves to a low potential region.

What is the relationship between current and voltage?

• They are directly proportional.

• They are inversely proportional.

• They are equal.

• They are unrelated.

What happens to the current if the voltage is increased?

• The current increases.

• The current remains the same.

• The current becomes zero.

• The current decreases.

What is the potential difference provided by a 1.5V battery?

• 2 joules

• 0.75 joules

• 3 joules

• 1.5 joules

What happens to the flow of charges when a battery is dead?

• Charges flow faster.

• Charges flow slower.

• No charges flow.

• Charges flow in reverse.