How many milliamperes is 1.5 amperes?
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.
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 Application
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.
FCC Part 97.3Key Concepts
Why Other Options 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.
题目解析
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.
考试技巧
Amperes to milliamperes = Multiply by 1000. Remember: To convert amperes to milliamperes, multiply by 1000. 1.5 A × 1000 = 1500 mA.
记忆口诀
**A**mperes **T**o **M**illiamperes = **A**dd **T**hree **Z**eros (think 'ATM = ATZ' = Add Three Zeros, multiply by 1000)
实际应用示例
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.
错误选项分析
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.
知识点
Current conversion, Milliamperes, Amperes, Unit conversion
Verified Content
Question from official FCC Technician Class question pool. Explanation reviewed by licensed amateur radio operators.