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Exam: TOEFL

electrometer

IPA: /ɪˈlɛktrəˌmɛtə/

KK: /ɪˈlɛktrəˌmɛtər/

noun

Definition: A device used to measure electrical voltage or potential differences between charged objects.

Example: The scientist used an electrometer to measure the voltage in the circuit.

electromyogram

IPA: /ˌɛlɛkˌtrɪˈmaɪəˌɡræm/

KK: /ɪˌlɛktrəˈmaɪəˌɡræm/

noun

Definition: A record that shows the electrical activity of a muscle, created by a device called an electromyograph.

Example: The doctor reviewed the electromyogram to assess the patient's muscle function.

electromyograph

IPA: /ˌɛlɛkˈtrɪməˌɡrɑf/

KK: /ɪˌlɛktrəˈmaɪəˌgræf/

noun

Definition: A device that records the electrical activity of muscles, often used to diagnose muscle and nerve disorders.

Example: The doctor used an electromyograph to check the patient's muscle function.

electron

IPA: /ɪˈlɛktrɒn/

KK: /ɪˈlɛktrɒn/

noun

Definition: A very small particle that has a negative electric charge and is found in atoms. Electrons are important for electricity and chemical reactions.

Example: Electrons move around the nucleus of an atom and play a key role in electricity.

electronegative

IPA: /ˌɛlɛktrəˈnɛɡətɪv/

KK: /ɪˌlɛktrəˈnɛɡətɪv/

adjective

Definition: Having a tendency to attract electrons in a chemical bond, often resulting in a negative charge.

Example: Fluorine is the most electronegative element on the periodic table.

electronic

IPA: /ɪˈlɛktrɒnɪk/

KK: /ɪˈlɛktrɒnɪk/

adjective

Definition: Relating to devices or systems that use electricity and electronic technology, often involving computers or digital processes.

Example: Many people use electronic devices like smartphones and tablets every day.

electronically

IPA: /ɪˌlɛk.trəˈnɪk.li/

KK: /ɪˈlɛktrəˌnɪkli/

adverb

Definition: In a way that involves the use of electronic devices or technology.

Example: The documents were submitted electronically to save time.

electrophorese

IPA: /ˌɛlɛkˈtrɒfəriz/

KK: /ɪˌlɛk.trəˈfɔːriz/

transitive verb

Definition: To subject a substance to a process that uses an electric field to separate charged particles, typically in a gel or solution.

Example: The scientist decided to electrophorese the DNA samples to analyze their size and purity.

electrophoresis

IPA: /ˌɛlɛk.tɹə.fəˈɹiː.sɪs/

KK: /ɪˌlɛk.trə.fɔːˈriː.sɪs/

noun

Definition: A technique used to separate and analyze substances, particularly proteins, by moving them through a medium under the influence of an electric field.

Example: Electrophoresis is commonly used in laboratories to analyze DNA samples.

electroplating

IPA: /ɪˈlɛk.trəˌpleɪ.tɪŋ/

KK: /ɪˈlɛk.trəˌpleɪ.tɪŋ/

noun

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.

verb

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.

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