Exam: GRE (Verbal)

Definition: A device used to create static electricity, made up of a hard rubber disk that gains a negative charge through friction and a metal plate that becomes positively charged when it touches the disk.

Example: The scientist used an electrophorus to demonstrate the principles of static electricity in the classroom.

Definition: A method used to cover the surface of a metal item with a thin layer of another metal using electricity, often to improve its appearance or protect it from corrosion.

Example: The jewelry was made more attractive through electroplating with gold.

Definition: To coat a surface with a layer of metal using an electric current.

Example: The factory uses electroplating to give the metal parts a shiny finish.

Definition: The process of using a high-voltage electrical pulse to create temporary openings in a cell membrane, allowing substances like drugs or DNA to enter the cell.

Example: Researchers used electroporation to introduce the new DNA into the cells effectively.

Definition: Having a tendency to give away electrons and form positive ions in chemical reactions.

Example: Sodium is an electropositive element that easily loses an electron to form a positive ion.

Definition: A type of sensory organ found in some fish that can sense electric fields in the water.

Example: Sharks use their electroreceptors to detect the electric signals produced by their prey.

Definition: A device that shows whether something has an electric charge by using metal parts that move apart or come together.

Example: The scientist used an electroscope to check if the object was electrically charged.

Definition: A medical treatment that uses electric currents to induce seizures in the brain, often used to treat severe mental health conditions.

Example: Electroshock therapy can be an effective treatment for some patients with depression.

Definition: Related to electric charges that are not moving.

Example: The electrostatic force between the two charged objects caused them to attract each other.

Definition: The branch of physics that studies electric charges at rest and the forces between them.

Example: Electrostatics is important in understanding how charged objects interact with each other.

Definition: A type of surgery that uses high-frequency electric current to cut or destroy tissue, often used for cauterization.

Example: The doctor performed electrosurgery to remove the tumor safely.