Which of the following battery chemistries is not rechargeable?
The correct answer is B: Carbon-zinc. Carbon-zinc batteries are not rechargeable - they are primary (non-rechargeable) batteries. Once discharged, they cannot be recharged and must be discarded.
Carbon-zinc batteries are primary batteries that use a zinc anode and carbon cathode with an electrolyte. They're inexpensive and commonly used in low-drain applications, but they're not designed to be recharged. Attempting to recharge them can be dangerous. In contrast, Nickel-cadmium, Lead-acid, and Lithium-ion are all secondary (rechargeable) batteries designed to be recharged many times. Understanding which batteries are rechargeable is important for proper battery selection and safety.
Exam Tip
Carbon-zinc = Not rechargeable. Remember: Carbon-zinc batteries are primary (non-rechargeable) batteries - once discharged, they cannot be recharged.
Memory Aid
"**C**arbon-**z**inc = **N**ot **R**echargeable (think 'CZ = NR')"
Real-World Application
You're using carbon-zinc batteries in a low-power device. When they're discharged, you must replace them - they cannot be recharged. If you tried to recharge them, it could be dangerous. This is why carbon-zinc batteries are considered disposable primary batteries.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Nickel-cadmium (NiCd) batteries are rechargeable. They're secondary batteries designed to be recharged many times.
Option C: Incorrect. Lead-acid batteries are rechargeable. They're commonly used in vehicles and base stations and are designed to be recharged.
Option D: Incorrect. Lithium-ion batteries are rechargeable. They're used in modern portable devices and are designed to be recharged many times.
题目解析
The correct answer is B: Carbon-zinc. Carbon-zinc batteries are not rechargeable - they are primary (non-rechargeable) batteries. Once discharged, they cannot be recharged and must be discarded. Carbon-zinc batteries are primary batteries that use a zinc anode and carbon cathode with an electrolyte. They're inexpensive and commonly used in low-drain applications, but they're not designed to be recharged. Attempting to recharge them can be dangerous. In contrast, Nickel-cadmium, Lead-acid, and Lithium-ion are all secondary (rechargeable) batteries designed to be recharged many times. Understanding which batteries are rechargeable is important for proper battery selection and safety.
考试技巧
Carbon-zinc = Not rechargeable. Remember: Carbon-zinc batteries are primary (non-rechargeable) batteries - once discharged, they cannot be recharged.
记忆口诀
**C**arbon-**z**inc = **N**ot **R**echargeable (think 'CZ = NR')
实际应用示例
You're using carbon-zinc batteries in a low-power device. When they're discharged, you must replace them - they cannot be recharged. If you tried to recharge them, it could be dangerous. This is why carbon-zinc batteries are considered disposable primary batteries.
错误选项分析
Option A: Incorrect. Nickel-cadmium (NiCd) batteries are rechargeable. They're secondary batteries designed to be recharged many times. Option C: Incorrect. Lead-acid batteries are rechargeable. They're commonly used in vehicles and base stations and are designed to be recharged. Option D: Incorrect. Lithium-ion batteries are rechargeable. They're used in modern portable devices and are designed to be recharged many times.
知识点
Non-rechargeable batteries, Carbon-zinc, Primary batteries, Battery types
Verified Content
Question from official FCC Technician Class question pool. Explanation reviewed by licensed amateur radio operators.