Question 316456
The signal to a speaker causes .5 amps of current.
 The signal level is increased to 2.5 amps.
 What is the gain, rounded to the nearest decibel? 
:
The decibel gain formula using current: db = 20log{{{(I2/I1)}}}
where I1=.5, I2=2.5
:
db = 20log{{{(2.5/.5)}}}
db = 20log(5)
db = 20*.69897
db = 13.9794 ~ 14 db gain