- Lithium-ion batteries are a type of rechargeable battery commonly used in portable electronic devices. - They offer high energy density, meaning they can store a large amount of energy relative to their weight and volume. - They have a low self- discharge rate and no memory effect.
(B-4) C. K (Potassium): Potassium ions (K+) are also essential electrolytes involved in various bodily functions, including the transmission of nerve impulses and muscle contractions (along with sodium ions). This matches characteristic 3. (C-3) D. Cs (Cesium): Cesium is an alkali metal, and the isotope Cesium-133 is famously used in atomic clocks due to the highly stable frequency of radiation emitted during electron transitions in its atom, which defines the length of a second. This matches characteristic 1. (D-1) Thus, the correct matching is A-2, B-4, C-3, D-1, which corresponds to option C (2 4 3 1). 142. Batteries used in mobile and smart phones are:
Asked in OPSC CS Prelims 2019 · Topic: Metals, Minerals, Ores: Properties, Uses (Uses of common metals and their compounds in industries and daily life)
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Answer: C. Lithium-ion battery
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