Question
Four identical cells, each having an emf of 1.8 V,
are linked in parallel and connected to an external network made of two resistors of 10 Ω each arranged in parallel. If the potential difference across the output terminals is measured to be 1.5 V by an ideal voltmeter, what is the internal resistance of each cell?Solution
When multiple identical cells are joined in parallel, the net emf remains the same as that of a single cell. Hence,
Total emf (E) = 1.8 V Let r be the internal resistance of each cell. Since the cells are in parallel, their effective internal resistance is reduced: 
Now, calculate the combined resistance of the external circuit: Two 10 Ω resistors in parallel: 
Using Ohm’s law: 
The potential drop inside the battery system due to internal resistance is: 
विज्ञान एक दुधारी तलवार कि भांति है।
ऊर्ध्वाधर और क्षैतिज आरक्षण में क्या अंतर है?
This sentence can be ...
Benefiaciary के लिए लिए सही पारिभाषिक शब्द है
मधुमेह एक ऐसा रोग है जो आज भारत ही नहीं पूरे विश्व में एक मह...
‘ Mutations ’ के लिए हिन्दी पारिभाषिक शब्द है?
निम्नलिखित विकल्पों में से outward capital flow शब्द का कौन सा पर्याय ...
The following Hindi sentences are followed by four different ways in which they can be paraphrased in English language. Identify the option wh...
जहाँ मौखिक अनुवाद कि आवश्यकता होती है, वहाँ उच्चारण का महत...
The books supplied to the sections will be in the custody of the Assistant Audit Officers in charge of the sections.
निम्नलिखित में से general obligation bond शब्द का वित्तीय शब्दावल�...
Relevant for Exams:
