Multiple choice

Kilohertz is a unit which measures

  1. electric resistance

  2. power used by a current of one ampere

  3. electromagnetic radio wave frequencies

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Kilohertz (kHz) is a unit of frequency equal to one thousand cycles per second (10^3 Hz). It is commonly used to measure electromagnetic wave frequencies, especially in radio broadcasting. Electric resistance is measured in ohms, and power is measured in watts.

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