How do you calculate the loop voltage drop across sensors and resistors for a given supply and current?

• A. Apply V_drop = I × R for each element; sum all drops; ensure total < supply
• B. Use P = V × I for the whole loop
• C. Use V_drop = I × (R_total) without per-element calculation
• D. Use Ohm's law only for the supply and ignore elements

Answer: (A)