What is an advantage of batteries with low internal resistance?
The correct answer is B: High discharge current. An advantage of batteries with low internal resistance is high discharge current. Low internal resistance allows the battery to deliver high current without excessive voltage drop. For amateur radio operators, this is important for high-power operation. Understanding this helps when selecting batteries.
Exam Tip
Low internal resistance advantage = high discharge current. Think 'L'ow 'R'esistance = 'L'ess 'R'estriction = 'H'igh 'C'urrent. Low resistance allows high current without excessive voltage drop. Not long life, not high voltage, not rapid recharge - just high discharge current.
Memory Aid
"Low internal resistance advantage = high discharge current. Think 'L'ow 'R'esistance = 'L'ess 'R'estriction. Low resistance allows high current without excessive voltage drop. Important for high-power operation."
Real-World Application
A battery with low internal resistance can deliver high current (e.g., 20 amps) for your 100-watt transceiver without excessive voltage drop. A battery with high internal resistance would have significant voltage drop under the same load, limiting usable current. Low resistance enables high discharge current.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Low internal resistance doesn't necessarily mean long life - life depends on chemistry and usage, not just resistance. Life isn't directly related to resistance.
Option C: Incorrect. Low internal resistance doesn't mean high voltage - voltage is determined by chemistry, not resistance. Resistance affects voltage drop under load, not nominal voltage.
Option D: Incorrect. Low internal resistance doesn't mean rapid recharge - recharge rate depends on chemistry and charger, not just resistance. Recharge rate isn't directly related to resistance.
题目解析
The correct answer is B: High discharge current. An advantage of batteries with low internal resistance is high discharge current. Low internal resistance allows the battery to deliver high current without excessive voltage drop. For amateur radio operators, this is important for high-power operation. Understanding this helps when selecting batteries.
考试技巧
Low internal resistance advantage = high discharge current. Think 'L'ow 'R'esistance = 'L'ess 'R'estriction = 'H'igh 'C'urrent. Low resistance allows high current without excessive voltage drop. Not long life, not high voltage, not rapid recharge - just high discharge current.
记忆口诀
Low internal resistance advantage = high discharge current. Think 'L'ow 'R'esistance = 'L'ess 'R'estriction. Low resistance allows high current without excessive voltage drop. Important for high-power operation.
实际应用示例
A battery with low internal resistance can deliver high current (e.g., 20 amps) for your 100-watt transceiver without excessive voltage drop. A battery with high internal resistance would have significant voltage drop under the same load, limiting usable current. Low resistance enables high discharge current.
错误选项分析
Option A: Incorrect. Low internal resistance doesn't necessarily mean long life - life depends on chemistry and usage, not just resistance. Life isn't directly related to resistance. Option C: Incorrect. Low internal resistance doesn't mean high voltage - voltage is determined by chemistry, not resistance. Resistance affects voltage drop under load, not nominal voltage. Option D: Incorrect. Low internal resistance doesn't mean rapid recharge - recharge rate depends on chemistry and charger, not just resistance. Recharge rate isn't directly related to resistance.
知识点
Low internal resistance, High discharge current, Battery performance, Internal resistance
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.