What is the electric current produced when a voltage of #9 V# is applied to a circuit with a resistance of #66 Omega#?

1 Answer
Jan 23, 2016

Answer:

Current #=136.364 " mA"#

Explanation:

#I=V/R# where #I# is the current, #V# is the voltage, and #R# is the resistance.
#color(white)("XX")#Think of it this way:
#color(white)("XXXX")#If you increase the pressure (voltage), you will increase the amount of current.
#color(white)("XXXX")#If you increase the resistance, you will decrease the amount of current.
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Current is measured with a base unit of #A = # ampere which is defined as the current produced by #1 V# through a circuit with #1 Omega# resistance.

For the given values:
#color(white)("XXX")I = (9 V)/(66 Omega)#

#color(white)("XXX")=3/22 A = 0.136364 A#

For values in this range it is more common to specify the result in #mA# (miliamperes) where #1000 mA = 1 A#