Electricity Pre Lab 1 - Measuring Potential Difference

Match the definition with the vocabulary term: Voltage

• Resistance

• Measure of how much potential a charge loses when it move through a material

• Resistance

• Measured in ohms

• Voltage

• The ratio of voltage to current

What is the flow direction of direct current?

What unit is used to measure current?

• The unit used to measure current is the Ampere (A).

• The unit used to measure current is the Volt (V).

• The unit used to measure current is the Ohm (Ω).

• The unit used to measure current is the Watt (W).

What is the difference between direct current and alternating current?

• Direct current flows in one direction, while alternating current changes direction periodically.

• Direct current changes direction periodically, while alternating current flows in one direction.

• Both direct and alternating current flow in one direction.

• Both direct and alternating current change direction periodically.

How many times per second does the direction of charges change in alternating current?

What is an example of a device that uses direct current?

• Flashlight

• Ceiling fan

• Refrigerator

• Washing machine

What is a source in the context of electrical energy?

• A device that consumes electrical energy

• A device that stores electrical energy

• A device that generates electrical energy

• A device that measures electrical energy

In a cell, chemical reactions occur at sites called ________.

• sites

• nuclei

• membranes

• vacuoles

Which of the following is NOT a component of a dry cell?

• Cathode

• Anode

• Water

• Zinc Casing

What is the role of the electrolyte in a cell?

• To provide energy to the cell

• To conduct electricity within the cell

• To store charge in the cell

• To insulate the cell components