JEE Main 2021 (Online) 26th February Evening Shift | Magnetics Question 120 | Physics

JEE Main 2021 (Online) 26th February Evening Shift

MCQ (Single Correct Answer)

-1

An aeroplane, with its wings spread 10 m, is flying at a speed of 180 km/h in a horizontal direction. The total intensity of earth's field at that part is 2.5 $$\times$$ 10^$$-$$4 Wb/m² and the angle of dip is 60$$^\circ$$. The emf induced between the tips of the plane wings will be __________.

88.37 mV

62.50 mV

54.125 mV

108.25 mV

JEE Main 2021 (Online) 25th February Evening Shift

MCQ (Single Correct Answer)

-1

In a ferromagnetic material, below the curie temperature, a domain is defined as :

a macroscopic region with zero magnetization.

a macroscopic region with saturation magnetization.

a macroscopic region with randomly oriented magnetic dipoles.

a macroscopic region with consecutive magnetic dipoles oriented in opposite direction.

JEE Main 2021 (Online) 25th February Morning Shift

MCQ (Single Correct Answer)

-1

A proton, a deuteron and an $$\alpha$$ particle are moving with same momentum in a uniform magnetic field. The ratio of magnetic forces acting on them is _________ and their speed is _______, in the ratio.

2 : 1 : 1 and 4 : 2 : 1

4 : 2 : 1 and 2 : 1 : 1

1 : 2 : 4 and 2 : 1 : 1

1 : 2 : 4 and 1 : 1 : 2

JEE Main 2021 (Online) 25th February Morning Shift

MCQ (Single Correct Answer)

-1

Magnetic fields at two points on the axis of a circular coil at a distance of 0.05 m and 0.2 m from the centre are in the ratio 8 : 1. The radius of coil is ________.

1.0 m

0.15 m

0.2 m

0.1 m

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