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Quantities and Units - Engineering

Q1:

The number 3.2 × 10–5 A expressed using a metric prefix is

A 32 µA

B 3.3 µA

C 320 mA

D 3,200 mA

ANS:A - 32 µA

1 micro−ampere = 10 − 6 A = 1/10^6. = 0.000001
3.2 × 10–5 A = 3.2 x 1/10^5 = 0.000032.
Therefore; 3.2 x 10^-5 A= 32 micro- ampere.