Current Electricity - Result Question 28
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30. Resistances $n$, each of $r$ ohm, when connected in parallel give an equivalent resistance of $R$ $ohm$. If these resistances were connected in series, the combination would have a resistance in ohms, equal to
======= ####30. Resistances $n$, each of $r$ ohm, when connected in parallel give an equivalent resistance of $R$ $ohm$. If these resistances were connected in series, the combination would have a resistance in ohms, equal to
3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed:content/english/neet-pyq-chapterwise/physics/current-electricity/current-electricity—result-question-28.md (a) $n R$
(c) $R / n^{2}$
(b) $n^{2} R$
(d) $R / n$
[2004]
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Answer:
Correct Answer: 30. (b)
Solution:
- (b) $R=\frac{r}{n} \Rightarrow r=n R$
When connected in series, $R _{\text{eq }}=n r$ $=n(n R)=n^{2} R$
