1
NEET 2022 Phase 1
+4
-1

A long solenoid of radius 1 mm has 100 turns per mm. If 1 A current flows in the solenoid, the magnetic field strength at the centre of the solenoid is

A
6.28 $$\times$$ 10$$-$$2 T
B
12.56 $$\times$$ 10$$-$$2 T
C
12.56 $$\times$$ 10$$-$$4 T
D
6.28 $$\times$$ 10$$-$$4 T
2
NEET 2022 Phase 1
+4
-1

Given below are two statements:

Statement I : Biot-Savart's law gives us the expression for the magnetic field strength of an infinitesimal current element (Idl) of a current carrying conductor only.

Statement II : Biot-Savart's law is analogous to Coulomb's inverse square law of charge q, with the former being related to the field produced by a scalar source, Idl while the latter being produced by a vector source, q.

In light of above statements choose the most appropriate answer from the options given below.

A
Both Statement I and Statement II are correct
B
Both Statement I and Statement II are incorrect
C
Statement I is correct and Statement II is incorrect
D
Statement I is incorrect and Statement II is correct
3
NEET 2022 Phase 1
+4
-1

A square loop of side 1 m and resistance 1 $$\Omega$$ is placed in a magnetic field of 0.5 T. If the plane of loop is perpendicular to the direction of magnetic field, the magnetic flux through the loop is

A
2 weber
B
0.5 weber
C
1 weber
D
Zero weber
4
NEET 2022 Phase 1
+4
-1

From Ampere's circuital law for a long straight wire of circular cross-section carrying a steady current, the variation of magnetic field in the inside and outside region of the wire is

A
Uniform and remains constant for both the regions.
B
A linearly increasing function of distance upto the boundary of the wire and then linearly decreasing for the outside region.
C
A linearly increasing function of distance r upto the boundary of the wire and then decreasing one with $${1 \over r}$$ dependence for the outside region.
D
A linearly decreasing function of distance upto the boundary of the wire and then a linearly increasing one of the outside region.
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