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

Two long parallel conductors S1 and S2 are separated by a distance 10 cm and carrying currents of 4A and 2A respectively. The conductors are placed along x-axis in X-Y plane. There is a point P located between the conductors (as shown in figure).

A charge particle of 3$$\pi$$ coulomb is passing through the point P with velocity $$\overrightarrow v = (2\widehat i + 3\widehat j)$$ m/s; where $$\widehat i$$ and $$\widehat j$$ represents unit vector along x & y axis respectively.

The force acting on the charge particle is $$4\pi \times {10^{ - 5}}( - x\widehat i + 2\widehat j)$$ N. The value of x is :

A
2
B
1
C
3
D
$$-$$3
2
JEE Main 2022 (Online) 27th June Morning Shift
+4
-1

A 72 $$\Omega$$ galvanometer is shunted by a resistance of 8 $$\Omega$$. The percentage of the total current which passes through the galvanometer is :

A
0.1%
B
10%
C
25%
D
0.25%
3
JEE Main 2022 (Online) 26th June Evening Shift
+4
-1

The equivalent resistance between points A and B in the given network is :

A
65$$\Omega$$
B
20$$\Omega$$
C
5$$\Omega$$
D
2$$\Omega$$
4
JEE Main 2022 (Online) 26th June Morning Shift
+4
-1

An aluminium wire is stretched to make its length, 0.4% larger. The percentage change in resistance is :

A
0.4%
B
0.2%
C
0.8%
D
0.6%
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