1
NEET 2023
+4
-1

A very long conducting wire is bent in a semi-circular shape from $$A$$ to $$B$$ as shown in figure. The magnetic field at point $$P$$ for steady current configuration is given by :

A
$$\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}}$$ pointed away from the page
B
$$\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}}\left[1-\frac{2}{\pi}\right]$$ pointed away from page
C
$$\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}}\left[1-\frac{2}{\pi}\right]$$ pointed into the page
D
$$\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}}$$ pointed into the page
2
NEET 2022 Phase 2
+4
-1

A closely packed coil having 1000 turns has an average radius of 62.8 cm. If current carried by the wire of the coil is 1 A, the value of magnetic field produced at the centre of the coil will be (permeability of free space $$= 4\pi \times {10^{ - 7}}$$ H/m) nearly

A
10$$-$$3 T
B
10$$-$$1 T
C
10$$-$$2 T
D
102 T
3
NEET 2022 Phase 2
+4
-1

The shape of the magnetic field lines due to an infinite long, straight current carrying conductor is

A
a plane
B
a straight line
C
circular
D
elliptical
4
NEET 2022 Phase 2
+4
-1

Two very long, straight, parallel conductors A and B carry current of 5 A and 10 A respectively and are at a distance of 10 cm from each other. The direction of current in two conductors is same. The force acting per unit length between two conductors is : ($$\mu$$0 = 4$$\pi$$ $$\times$$ 10$$-$$7 SI unit)

A
1 $$\times$$ 10$$-$$4 Nm$$-$$1 and is repulsive
B
2 $$\times$$ 10$$-$$4 Nm$$-$$1 and is attractive
C
2 $$\times$$ 10$$-$$4 Nm$$-$$1 and is repulsive
D
1 $$\times$$ 10$$-$$4 Nm$$-$$1 and is attractive
EXAM MAP
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