Physics · 2017
JEE Main · 9 April 2017, Shift 1 · Q29
In a meter bridge experiment resistances are connected as shown in the figure. Initially resistance P =4 Ω and the neutral point N is at 60 cm from…
In a meter bridge experiment resistances are connected as shown in the figure. Initially resistance $\displaystyle \mathrm{P}=4 \Omega$ and the neutral point N is at $\displaystyle 60$ cm from A. Now an unknown resistance R is connected in series to P and the new position of the neutral point is at $\displaystyle 80$ cm from A. The value of unknown resistance R is :
Official answer
(4)
$\displaystyle \frac{20}{3} \Omega$
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JEE Main 2017 Physics question, with the answer from NTA’s final answer key. Where our answers come from.