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Examples: Units and Multiples<^< Multiples / Sub-multiples | Course Index | Electricity >^> Example 1:
An indicator lamp requires a current of 0.075A. What is this current when expressed in mA?
We can express the current in mA (rather than in A) by moving the decimal point three places to the right. Hence 0.075A is the same as 75mA. Example 2:
A medium wave radio transmitter operates on a frequency of 1,495kHz. What is its frequency expressed in MHz?
To express the frequency in MHz rather than kHz we need to move the decimal point three places to the left. Hence 1,495kHz is equivalent to 1.495MHz. Example 3:
A capacitor has a value of 27,000pF. What is its value expressed in µF?
To express the value in µF rather than pF we need to move the decimal point six places to the left. Hence 27,000pF is equivalent to 0.027µF (note that we have had to introduce an extra zero before the 2 and after the decimal point). <^< Multiples / Sub-multiples | Course index | Electricity >^> |