Search any question & find its solution
Question:
Answered & Verified by Expert
Assertion (A) Half of the charge of an electron does not exist. Reason (R) Electric charge is quantized.
Options:
Solution:
1031 Upvotes
Verified Answer
The correct answer is:
Both (A) and (R) are correct and (R) is the correct explanation of (A ).
The charge on any body can be expressed as the integral multiple of basic unit of charge i.e., charge on one electron. This phenomena is called quantisation of electric charge.
It can be written as $\mathrm{q}= \pm n e$, where $n=1,2,3 \ldots$.
Charge is said to be quantised because it can have only discrete values rather than any arbitrary value, i.e., free particle has no charge at all or a charge of $+10 e$ or $-6 e$ but not a free particle with a charge of, say $3.57 e$.
From above discussion, it is cleared that electric charge is quantised, which means charge can be written as integral multiple of charge an electron but it cannot be written as integral multiple of charge on half electron. It is because half of the charge of an electron does not exist.
Hence, assertion and reason both are correct and assertion is correct explanation.
It can be written as $\mathrm{q}= \pm n e$, where $n=1,2,3 \ldots$.
Charge is said to be quantised because it can have only discrete values rather than any arbitrary value, i.e., free particle has no charge at all or a charge of $+10 e$ or $-6 e$ but not a free particle with a charge of, say $3.57 e$.
From above discussion, it is cleared that electric charge is quantised, which means charge can be written as integral multiple of charge an electron but it cannot be written as integral multiple of charge on half electron. It is because half of the charge of an electron does not exist.
Hence, assertion and reason both are correct and assertion is correct explanation.
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.