1
JEE Main 2022 (Online) 26th July Morning Shift
Numerical
+4
-1

Resistances are connected in a meter bridge circuit as shown in the figure. The balancing length $$l_{1}$$ is $$40 \mathrm{~cm}$$. Now an unknown resistance $$x$$ is connected in series with $$\mathrm{P}$$ and new balancing length is found to be $$80 \mathrm{~cm}$$ measured from the same end. Then the value of $$x$$ will be ____________ $$\Omega$$.

2
JEE Main 2022 (Online) 25th July Evening Shift
Numerical
+4
-1

In a potentiometer arrangement, a cell of emf 1.20 V gives a balance point at 36 cm length of wire. This cell is now replaced by another cell of emf 1.80 V. The difference in balancing length of potentiometer wire in above conditions will be ___________ cm.

3
JEE Main 2022 (Online) 25th July Morning Shift
Numerical
+4
-1

In the given figure, the value of Vo will be _____________ V.

4
JEE Main 2022 (Online) 25th July Morning Shift
Numerical
+4
-1

Eight copper wire of length $$l$$ and diameter $$d$$ are joined in parallel to form a single composite conductor of resistance $$R$$. If a single copper wire of length $$2 l$$ have the same resistance $$(R)$$ then its diameter will be ____________ d.

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