Answer:
a) 0db
b) 11.1db (for power)
22.2db (for field quantities)
c) -6db (for power)
-12db (for field quantities)
d) 14db (for power)
28db (for field quantities)
Explanation:
We have to take care of the unit of that decimal numbers because it will affect the procedure.
for power quantities:
[tex]db=10log(X)[/tex]
for field quantities (as voltage or pressure):
[tex]db=20log(x)[/tex].
For power
a) [tex]db=10log(1)=0db[/tex]
b) [tex]db=10log(13)=11.1db[/tex]
c) [tex]db=10log(0.25)=-6db[/tex]
d) [tex]db=10log(25)=14db[/tex]
For field quantities:
a) [tex]db=20log(1)=0db[/tex]
b) [tex]db=20log(13)=22.2db[/tex]
c) [tex]db=20log(.25)=-12db[/tex]
d) [tex]db=20log(25)=28db[/tex]
