Electrical power formula P = V × I

Steps:

• Use the power formula P = V × I, where V is voltage and I is current.
• Given V = 250 V from the mains supply.
• Test each option by calculating P for the given I and V.
• Identify the pair where calculated P matches the stated power.

Why D is correct:

• It obeys Ohm's law-derived power equation: 250 V × 10 A = 2500 W exactly.

Why the others are wrong:

• A: 250 V × 0.5 A = 125 W, not 500 W.
• B: 250 V × 5.0 A = 1250 W, not 500 W.
• C: 250 V × 0.1 A = 25 W, not 2500 W.

Final answer: D