undine66770
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Briana builds a circuit that has a resistance of 8.0 ohms. What voltage should she apply to have a current of 0.8 A?

A: 0.10 V
B: 6.4 V
C: 7.2 V
D: 10 V

Respuesta :

naomibush
The correct answer is B. I just took my test. Thank you to the person who delted the wrong answers before. 
skyluke89

B: 6.4 V

Explanation:

the relationship between voltage, current and resistance in a circuit is given by Ohm's law:

[tex]V=RI[/tex]

where

V is the voltage

R is the resistance

I is the current

In this problem, the circuit has a resistance of [tex]R=8.0\Omega[/tex], while the current in the circuit is [tex]I=0.8 A[/tex]. Substituting the numbers into the equation, we can find the voltage:

[tex]V=(8.0 \Omega)(0.8 A)=6.4 V[/tex]

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