WB JEE 2023 | Electromagnetic Induction Question 4 | Physics

WB JEE 2023

MCQ (More than One Correct Answer)

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WB JEE 2023 Physics - Electromagnetic Induction Question 3 English

A circular coil is placed near a current carrying conductor, both lying on the plane of the paper. The current is flowing through the conductor in such a way that the induced current in the loop is clockwise as shown in the figure. The current in the wire is,

time dependent and downward.

steady and upward.

time dependent and upward.

An alternating current.

WB JEE 2023

MCQ (More than One Correct Answer)

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A charged particle of charge q and mass m is placed at a distance 2R from the centre of a vertical cylindrical region of radius R where magnetic field varies as $$\vec{B}=\left(4 t^{2}-2 t+6\right) \hat{k}$$, where t is time. Then which of the following statements is/are true?

Induced electric field lines form closed loops.

Electric field varies linearly with r if r < R, where r is the radial distance from the centerline of the cylinder.

The charged particle will move in clockwise direction when viewed from top.

Acceleration of the charged particle is $$\mathrm{\frac{7q}{2m}}$$ when t = 2 sec.

WB JEE 2021

MCQ (More than One Correct Answer)

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WB JEE 2021 Physics - Electromagnetic Induction Question 7 English

A particle of mass m and charge q moving with velocity v enters region-b from region-a along the normal to the boundary as shown in the figure. Region-b has a uniform magnetic field B perpendicular to the plane of the paper. Also, region-b has length L.

Choose the correct statement.

The particle enters region-c only if $$v > {{qLB} \over m}$$.

The particle enters region-c only if $$v < {{qLB} \over m}$$.

Path of the particle is a circle in region-b.

Time spent in region-b is independent of velocity v.

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