Electrical Engineering
Ohm’s Law (V = I × R)
Voltage (Volts) = Current (Amperes) × Resistance (Ohms)
Target Output: Voltage (V)[SOLVED]
3
VPotential difference across component
Current through component
Electrical resistance
💡 What This Is Useful For: Designing printed circuit boards (PCBs), choosing current-limiting resistors for LEDs, and testing automotive sensors.
📐 Real-World Worked Example: To power a 2.0 V, 20 mA (0.02 A) red LED from a 5.0 V microcontroller pin: Required voltage drop is 5 - 2 = 3 V. Resistor R = 3 / 0.02 = 150 Ohms.
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Scientifically reviewed by:D Yap, MBiochem (Oxon), DIC, PhD (Lond)
Clinical Medicine Research Scientist · LinkedIn Profile ↗
⚠️ Research Reference Notice: For reference and research education only. Reviewer is a clinical medicine research scientist and not a practicing physician or veterinarian, and does not provide clinical certification or medical advice. Experimental drug doses and clinical measurements must be verified against institutional protocols, primary manufacturer labeling, and physician orders.