Physics · 2019
JEE Main · 11 January 2019, Shift 1 · Q18
In a Wheatstone bridge(see fig.), Resistances P and Q are approximately equal. When R =400 Ω, the bridge is balanced. On interchanging P and Q, the…
In a Wheatstone bridge(see fig.), Resistances P and Q are approximately equal. When $\displaystyle \mathrm{R}=400 \Omega$, the bridge is balanced. On interchanging P and Q, the value of R, for balance, is $\displaystyle 405 \Omega$. The value of X is close to :
Official answer
(3)
402.$\displaystyle 5$ ohm
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