1
JEE Main 2023 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A square loop of area 25 cm$$^2$$ has a resistance of 10 $$\Omega$$. The loop is placed in uniform magnetic field of magnitude 40.0 T. The plane of loop is perpendicular to the magnetic field. The work done in pulling the loop out of the magnetic field slowly and uniformly in 1.0 sec, will be

A
$$\mathrm{1.0\times10^{-3}~J}$$
B
$$\mathrm{5\times10^{-3}~J}$$
C
$$\mathrm{2.5\times10^{-3}~J}$$
D
$$\mathrm{1.0\times10^{-4}~J}$$
2
JEE Main 2023 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The electric current in a circular coil of four turns produces a magnetic induction 32 T at its centre. The coil is unwound and is rewound into a circular coil of single turn, the magnetic induction at the centre of the coil by the same current will be :

A
2 T
B
4 T
C
8 T
D
16 T
3
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1

The magnitude of magnetic induction at mid point $$\mathrm{O}$$ due to current arrangement as shown in Fig will be

JEE Main 2023 (Online) 29th January Morning Shift Physics - Magnetics Question 31 English

A
$$\frac{\mu_{0} I}{\pi a}$$
B
$$\frac{\mu_{0} I}{4 \pi a}$$
C
$$\frac{\mu_{0} I}{2 \pi a}$$
D
0
4
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1

A single current carrying loop of wire carrying current I flowing in anticlockwise direction seen from +ve $$\mathrm{z}$$ direction and lying in $$x y$$ plane is shown in figure. The plot of $$\hat{j}$$ component of magnetic field (By) at a distance '$$a$$' (less than radius of the coil) and on $$y z$$ plane vs $$z$$ coordinate looks like

JEE Main 2023 (Online) 29th January Morning Shift Physics - Magnetics Question 32 English

A
JEE Main 2023 (Online) 29th January Morning Shift Physics - Magnetics Question 32 English Option 1
B
JEE Main 2023 (Online) 29th January Morning Shift Physics - Magnetics Question 32 English Option 2
C
JEE Main 2023 (Online) 29th January Morning Shift Physics - Magnetics Question 32 English Option 3
D
JEE Main 2023 (Online) 29th January Morning Shift Physics - Magnetics Question 32 English Option 4
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