picovolt

Thân thiện

A scientist measures a tiny signal of one picovolt on the oscilloscope screen.

Definition

1. Noun:
   • A unit of electrical potential equal to one trillionth of a volt: A "picovolt" is a derived unit of electromotive force or electric potential in the International System of Units (SI). It represents an extremely small voltage, specifically 10⁻¹² volts.

Usage

• The term "picovolt" is used in scientific and technical contexts, particularly in fields like physics, electrical engineering, and nanotechnology, where measuring minuscule electrical signals is necessary.
• It is typically used with a numerical value or in comparisons to describe very low voltage levels.

Examples

• Noun:
  • The sensor can detect signals as weak as a few picovolts.
  • The voltage difference across the junction was measured in picovolts.
  • One picovolt is equivalent to 0.000000000001 volts.

Advanced Usage

• "Picovolt-level noise": Refers to electrical interference or unwanted signal with an amplitude on the order of picovolts.
  • Shielding is crucial to reduce picovolt-level noise in the experiment.
• "Picovolt-per-root-hertz": A unit used to specify the noise density of ultra-sensitive amplifiers.
  • The amplifier boasts an impressive noise floor of 2 picovolts per root hertz.

Variants and Related Words

• Volt (V) (n): The SI base unit of electric potential.
• Millivolt (mV) (n): A unit equal to one thousandth of a volt (10⁻³ V).
• Microvolt (µV) (n): A unit equal to one millionth of a volt (10⁻⁶ V).
• Nanovolt (nV) (n): A unit equal to one billionth of a volt (10⁻⁹ V).
• Picovoltage (n): A less common term referring to a voltage measured in picovolts.

Synonyms

• Sub-nanovolt unit: A descriptive phrase for a unit of potential smaller than a nanovolt. (Note: "Picovolt" is the precise technical term.)

Notes on Meaning

• The "pico-" prefix is an SI prefix denoting a factor of 10⁻¹² (one trillionth). It is used with various units (e.g., picosecond, picofarad).
• This word has a single, highly specific meaning related to measurement. It does not have idiomatic or figurative uses.

Học thuật

Noun

1. a unit of potential equal to one trillionth of a volt