1
JEE Main 2022 (Online) 26th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A bar magnet having a magnetic moment of 2.0 $$\times$$ 105 JT$$-$$1, is placed along the direction of uniform magnetic field of magnitude B = 14 $$\times$$ 10$$-$$5 T. The work done in rotating the magnet slowly through 60$$^\circ$$ from the direction of field is :

A
14 J
B
8.4 J
C
4 J
D
1.4 J
2
JEE Main 2022 (Online) 26th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Two coils of self inductance L1 and L2 are connected in series combination having mutual inductance of the coils as M. The equivalent self inductance of the combination will be :

JEE Main 2022 (Online) 26th June Evening Shift Physics - Electromagnetic Induction Question 48 English

A
$${1 \over {{L_1}}} + {1 \over {{L_2}}} + {1 \over M}$$
B
$${L_1} + {L_2} + M$$
C
$${L_1} + {L_2} + 2M$$
D
$${L_1} + {L_2} - 2M$$
3
JEE Main 2022 (Online) 26th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A metallic conductor of length 1 m rotates in a vertical plane parallel to east-west direction about one of its end with angular velocity 5 rad s$$-$$1. If the horizontal component of earth's magnetic field is 0.2 $$\times$$ 10$$-$$4 T, then emf induced between the two ends of the conductor is :

A
5 $$\mu$$V
B
50 $$\mu$$V
C
5 mV
D
50 mv
4
JEE Main 2022 (Online) 26th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which is the correct ascending order of wavelengths?

A
$$\lambda$$visible < $$\lambda$$X-ray < $$\lambda$$gamma-ray < $$\lambda$$microwave
B
$$\lambda$$gamma-ray < $$\lambda$$X-ray < $$\lambda$$visible < $$\lambda$$microwave
C
$$\lambda$$X-ray < $$\lambda$$gamma-ray < $$\lambda$$visible < $$\lambda$$microwave
D
$$\lambda$$microwave < $$\lambda$$visible < $$\lambda$$gamma-ray < $$\lambda$$X-ray
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