1
JEE Main 2022 (Online) 27th June Morning Shift
Numerical
+4
-1

A cell, shunted by a 8 $$\Omega$$ resistance, is balanced across a potentiometer wire of length 3 m. The balancing length is 2 m when the cell is shunted by 4 $$\Omega$$ resistance. The value of internal resistance of the cell will be ____________ $$\Omega$$.

2
JEE Main 2022 (Online) 27th June Morning Shift
Numerical
+4
-1

The current density in a cylindrical wire of radius 4 mm is 4 $$\times$$ 106 Am$$-$$2. The current through the outer portion of the wire between radial distances $${R \over 2}$$ and R is ____________ $$\pi$$ A.

3
JEE Main 2022 (Online) 26th June Evening Shift
Numerical
+4
-1

Two 10 cm long, straight wires, each carrying a current of 5A are kept parallel to each other. If each wire experienced a force of 10$$-$$5 N, then separation between the wires is ____________ cm.

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

The length of a given cylindrical wire is increased to double of its original length. The percentage increase in the resistance of the wire will be ____________ %.

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