Unit Conversion for Electric Current

Steps:

• Identify the analogue ammeter scale, assuming it points to 1.6 on a milliampere (mA) range.
• Convert mA to microamperes (µA) using the factor: 1 mA = 1000 µA.
• Calculate: 1.6 mA × 1000 = 1600 µA.
• Match this value to the digital options.

Why A is correct:

• 1600 µA equals 1.6 mA exactly, matching the analogue reading via the standard prefix conversion (1 mA = 10³ µA).

Why the others are wrong:

• B: 16.0 mA equals 16,000 µA, ten times larger than 1.6 mA.
• C: 16.0 mA equals 16,000 µA, ten times larger than 1.6 mA.
• D: 1.60 A equals 1,600,000 µA (since 1 A = 10⁶ µA), 1000 times larger than 1.6 mA.

Final answer: A