1
JEE Main 2024 (Online) 31st January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A uniform magnetic field of $$2 \times 10^{-3} \mathrm{~T}$$ acts along positive $$Y$$-direction. A rectangular loop of sides $$20 \mathrm{~cm}$$ and $$10 \mathrm{~cm}$$ with current of $$5 \mathrm{~A}$$ is in $$Y-Z$$ plane. The current is in anticlockwise sense with reference to negative $$X$$ axis. Magnitude and direction of the torque is:

A
$$2 \times 10^{-4} \mathrm{~N}$$- $$\mathrm{m}$$ along negative $$Z$$-direction
B
$$2 \times 10^{-4} \mathrm{~N}$$ - $$\mathrm{m}$$ along positive $$X$$-direction
C
$$2 \times 10^{-4} \mathrm{~N}$$ - $$\mathrm{m}$$ along positive $$Y$$-direction
D
$$2 \times 10^{-4} \mathrm{~N}$$ - $$\mathrm{m}$$ along positive $$Z$$-direction
2
JEE Main 2024 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A rigid wire consists of a semicircular portion of radius $$R$$ and two straight sections. The wire is partially immerged in a perpendicular magnetic field $$B=B_0 \hat{k}$$ as shown in figure. The magnetic force on the wire if it has a current $$i$$ is:

JEE Main 2024 (Online) 31st January Morning Shift Physics - Magnetic Effect of Current Question 23 English

A
$$i B R \hat{j}$$
B
$$-2 i B R \hat{j}$$
C
$$2 i B R \hat{j}$$
D
$$-i B R \hat{j}$$
3
JEE Main 2024 (Online) 30th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Two insulated circular loop A and B of radius '$$a$$' carrying a current of '$$\mathrm{I}$$' in the anti clockwise direction as shown in the figure. The magnitude of the magnetic induction at the centre will be :

JEE Main 2024 (Online) 30th January Morning Shift Physics - Magnetic Effect of Current Question 19 English

A
$$\frac{\sqrt{2} \mu_0 I}{a}$$
B
$$\frac{\mu_0 I}{\sqrt{2} a}$$
C
$$\frac{\mu_0 \mathrm{I}}{2 \mathrm{a}}$$
D
$$\frac{2 \mu_0 I}{a}$$
4
JEE Main 2024 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Two particles $$X$$ and $$Y$$ having equal charges are being accelerated through the same potential difference. Thereafter they enter normally in a region of uniform magnetic field and describes circular paths of radii $$R_1$$ and $$R_2$$ respectively. The mass ratio of $$X$$ and $$Y$$ is :

A
$$\left(\frac{R_1}{R_2}\right)$$
B
$$\left(\frac{R_2}{R_1}\right)$$
C
$$\left(\frac{R_2}{R_1}\right)^2$$
D
$$\left(\frac{R_1}{R_2}\right)^2$$
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