The Basic lessons · Basic electronics and theory · B-005-001

Mastering Metric Prefixes for Radio

This lesson teaches you how to convert between common metric units like kilohertz, milliamperes, and megahertz. You will learn the simple logic of moving decimal points to handle the vast range of values in electronics.

This lesson is free to read; the rest are part of SignalPrep Pro. The subsection's 11 exam questions are free to practise: practise B-005-001.

What this subsection asks

• If a dial marked in megahertz shows a reading of 3.525 MHz, what would it show if it were marked in kilohertz?
• If an ammeter marked in amperes is used to measure a 3000-milliampere current, what reading would it show?
• How many hertz is 1 kHz?
• How many microfarads is 1 000 000 picofarads?
• If you have a hand-held transceiver that puts out 500 milliwatts, how many watts would this be?
• A kilohm is:
• How many megahertz is 7040 kHz?
• A current of one quarter ampere may be written as:
• How many millivolts equal two volts?
• How can a frequency in megahertz be stated in gigahertz?
• How many millihenries equal 10 000 microhenries?