Respuesta :
The value of R₃ is 10Ω which is correct option(A).
What is ohm's law?
Ohm's law states that, the strength of a direct current is directly proportional to the potential difference and inversely proportional to the resistance of the circuit.
According to Ohm's law : V = IR
I = 2.0A
V = 30V
There are 3 resistors in series, connected
R = R₁ + R₂ + R₃
R = 2 + 3 +R₃ = 5 + R₃
Substitute the values in ohm's law
30 = 2(5 + R₃)
30 = 10 + 2R₃
20 = 2R₃
R₃ = 10
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