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Briana builds a circuit that has a resistance of [tex]$8.0 \Omega$[/tex]. What voltage should she apply to have a current of [tex]$0.8 A$[/tex]?

A. [tex]0.10 V[/tex]
B. [tex]6.4 V[/tex]
C. [tex]7.2 V[/tex]
D. [tex]10 V[/tex]

Sagot :

GinnyAnswer
To determine the voltage Briana should apply to achieve a current of 0.8 amperes in a circuit that has a resistance of 8.0 ohms, we need to use Ohm's Law. Ohm's Law states that the voltage (V) across a resistor is equal to the current (I) through the resistor times the resistance (R) of the resistor.

The formula is given by:

[tex]\[ V = I \times R \][/tex]

Here, we are given:
- The resistance [tex]\( R = 8.0 \)[/tex] ohms
- The current [tex]\( I = 0.8 \)[/tex] amperes

Substitute the given values into the equation:

[tex]\[ V = 0.8 \, \text{A} \times 8.0 \, \Omega \][/tex]

[tex]\[ V = 6.4 \, \text{V} \][/tex]

Therefore, the voltage that Briana should apply is [tex]\( 6.4 \)[/tex] volts.

Among the given options:
- [tex]$0.10 V$[/tex]
- [tex]$6.4 V$[/tex]
- [tex]$7.2 V$[/tex]
- [tex]$10 V$[/tex]

The correct answer is [tex]\( 6.4 \, V \)[/tex].
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