Question

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.

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**.