A simple circuit within a laptop has a single resistor with a resistance of 0.1 Ω and requires a current of 50 mA. Select the voltage that would allow the computer to function correctly.

Question

5 V
50 V
500 mV
5 mV

Answer 1

To find the voltage required for the circuit, we can use Ohm's Law, which states:

\[ V = I \times R \]

where:

• \( V \) is the voltage,
• \( I \) is the current,
• \( R \) is the resistance.

Given:

• \( I = 50 , \text{mA} = 0.050 , \text{A} \)
• \( R = 0.1 , \Omega \)

Now we can substitute the values into the equation:

\[ V = 0.050 , \text{A} \times 0.1 , \Omega \] \[ V = 0.005 , \text{V} \] \[ V = 5 , \text{mV} \]

Therefore, the voltage that would allow the computer to function correctly is 5 mV.