High Voltage Minimizes Power Loss by Reducing Current

Steps:

• Electrical power transmitted is P = V × I; for constant P, increasing V decreases I.
• Power loss in cables occurs as heat, given by loss = I²R, where R is resistance.
• Lower I from high V directly reduces I²R, minimizing loss.
• Thus, high voltage transmission results in low current and low power loss.

Why D is correct:

• High V lowers I (from P = VI) and reduces loss (from loss = I²R), achieving efficient transmission.

Why the others are wrong:

• A: Low current should reduce loss per I²R, not increase it.
• B: High V lowers I, so current cannot be high.
• C: High current would increase loss per I²R, not reduce it.

Final answer: D