38. Kilohertz is a unit which measures A.Electromagnetic radio wave frequencies B.Electric resistance C.Power used by a current of one ampere D.Voltage
Option A Solution: The hertz (Hz) is defined as one cycle per second and is a SI unit of frequency. Here kilohertz is also a unit of frequency of waves and is defined as 1000 cycles per second. Radio waves are measured in kilohertz (KHz).
