JEE Main 2021 (Online) 27th August Morning Shift | Magnetics Question 84 | Physics

JEE Main 2021 (Online) 27th August Morning Shift

MCQ (Single Correct Answer)

-1

A bar magnet is passing through a conducting loop of radius R with velocity $$\upsilon $$. The radius of the bar magnet is such that it just passes through the loop. The induced e.m.f. in the loop can be represented by the approximate curve :

JEE Main 2021 (Online) 27th August Morning Shift Physics - Magnetics Question 86 English

JEE Main 2021 (Online) 27th August Morning Shift Physics - Magnetics Question 86 English

JEE Main 2021 (Online) 27th August Morning Shift Physics - Magnetics Question 86 English Option 1

JEE Main 2021 (Online) 27th August Morning Shift Physics - Magnetics Question 86 English Option 2

JEE Main 2021 (Online) 27th August Morning Shift

MCQ (Single Correct Answer)

-1

Two ions of masses 4 amu and 16 amu have charges +2e and +3e respectively. These ions pass through the region of constant perpendicular magnetic field. The kinetic energy of both ions is same. Then :

lighter ion will be deflected less than heavier ion

lighter ion will be deflected more than heavier ion

both ions will be deflected equally

no ion will be deflected

JEE Main 2021 (Online) 26th August Evening Shift

MCQ (Single Correct Answer)

-1

A light beam is described by $$E = 800\sin \omega \left( {t - {x \over c}} \right)$$. An electron is allowed to move normal to the propagation of light beam with a speed of 3 $$\times$$ 10⁷ ms^$$-$$1. What is the maximum magnetic force exerted on the electron?

1.28 $$\times$$ 10^$$-$$18 N

1.28 $$\times$$ 10^$$-$$21 N

12.8 $$\times$$ 10^$$-$$17 N

12.8 $$\times$$ 10^$$-$$18 N

JEE Main 2021 (Online) 26th August Morning Shift

MCQ (Single Correct Answer)

-1

The fractional change in the magnetic field intensity at a distance 'r' from centre on the axis of current carrying coil of radius 'a' to the magnetic field intensity at the centre of the same coil is : (Take r < a)

$${3 \over 2}{{{a^2}} \over {{r^2}}}$$

$${2 \over 3}{{{a^2}} \over {{r^2}}}$$

$${2 \over 3}{{{r^2}} \over {{a^2}}}$$

$${3 \over 2}{{{r^2}} \over {{a^2}}}$$

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