a 3.0 ohm resistor an unkown resistor r and two ammeters a1 and a2 are connected with a 12 volt source ammeter a2 reads a current of 5.0 amperes
1) detemine the equivalent resistance of the circuit
2) caculate the current measure of ammeter a 1
3) caculate the resistance of the unknown resistor r
v= 12 v
a2 = 5.0 a
a1 = ?
r1 = 3.0 ohm
this is a parallel circuit so
do i use v/a to find equivalent resistance?
for current do i use v/r to find a?
and for the resistor is this equation right 1/req = 1/r1 + 1/r2
The Attempt at a Solution
i got 2.4 ohm for the equivalent resistance and 4 a for the current don't know if it right