Question

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

Answer 1

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

Answer 2

B: 6.4 V

Step-by-step explanation:

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

`V=RI`

where

V is the voltage

R is the resistance

I is the current

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

`V=(8.0 \Omega)(0.8 A)=6.4 V`