Ohm's Law
Ohm's Law describes the relationship between current, voltage, and resistance with the formula:
[ V = I \times R ]
Where:
- (V) is the voltage (in volts, V)
- (I) is the current (in amperes, A)
- (R) is the resistance (in ohms, Ω)
To find the required resistance (R), we can rearrange the formula:
[ R = \frac{V}{I} ]
Example Calculation
Given the conditions:
- Voltage (V = 3.3) V
- Current (I = 100) mA = 0.1 A
Substituting into the formula:
[ R = \frac{3.3}{0.1} = 33 \, \Omega ]
Thus, to achieve a current of 100 mA with a voltage of 3.3V, the required resistance is 33 ohms.