Deep Dive: T5B01
The correct answer is C: 1500 milliamperes. 1.5 amperes equals 1500 milliamperes. The prefix 'milli-' means one-thousandth, so 1 milliampere = 0.001 amperes. To convert amperes to milliamperes, multiply by 1000. 1.5 amperes × 1000 = 1500 milliamperes. This is a straightforward unit conversion. Milliamperes (mA) are commonly used for smaller currents, while amperes (A) are used for larger currents. Understanding these conversions is important for reading equipment specifications and calculating power requirements.
Why Other Answers Are Wrong
Option A: Incorrect. 15 milliamperes is only 0.015 amperes, not 1.5 amperes. You need to multiply by 1000, not divide. Option B: Incorrect. 150 milliamperes equals 0.15 amperes, not 1.5 amperes. You're off by a factor of 10. Option D: Incorrect. 15,000 milliamperes equals 15 amperes, not 1.5 amperes. You multiplied by 10,000 instead of 1,000.
Exam Tip
Amperes to milliamperes = Multiply by 1000. Remember: To convert amperes to milliamperes, multiply by 1000. 1.5 A × 1000 = 1500 mA.
Memory Aid
**A**mperes **T**o **M**illiamperes = **A**dd **T**hree **Z**eros (think 'ATM = ATZ' = Add Three Zeros, multiply by 1000)
Real-World Example
Your transceiver draws 1.5 amperes when receiving. This is the same as 1500 milliamperes. Equipment specifications might list current in either amperes or milliamperes, so knowing this conversion helps you understand the specifications. A 1500 mA power supply rating means it can supply 1.5 amperes.
Source & Coverage
Question Pool: 2022-2026 Question Pool
Subelement: T5B
Reference: FCC Part 97.3
Key Concepts
Verified Content
Question from the official FCC Technician Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the T5B topic.