1
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
2
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
3
NEET 2022 Phase 2
+4
-1

The magnetic field on the axis of a circular loop of radius 100 cm carrying current $$I = \sqrt 2 \,A$$, at point 1 m away from the centre of the loop is given by :

A
$$6.28 \times {10^{ - 4}}$$ T
B
$$3.14 \times {10^{ - 7}}$$ T
C
$$6.28 \times {10^{ - 7}}$$ T
D
$$3.14 \times {10^{ - 4}}$$ T
4
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
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Mechanics
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