Question

In
5T
37
A metallic coin of finite size is sliding on a long frictionless horizontal table. A uniform vertical magnetic
field B exists between P, & P, of this table as shown. Which figure accurately depicts the speed of coin
as it slides across the table :
VA
V
(D)
(B)
>
>
1.
1
nin nlaced in uniform magnetic field B. Its one curved portion is turned​

Answer 1

Answer:

I think it's a B or D but I am not sure

Answer 2

Figure C accurately depicts the speed of the coin.

Effect of magnetic field on a moving conductor:

• A moving conductor in a uniform magnetic field gives rise to an induced emf in the conductor.
• This then gives rise to an induced current in the conductor.
• A moving current-carrying conductor starts experiencing magnetic force on itself also called the Lorenz Force.

Direction of Lorentz Force:

• The direction of Lorentz force is determined using the Right-Hand Rule.
• The rule states that 'To determine the direction of the magnetic force point the thumb of the right hand in the direction of v, the fingers in the direction of B, and a perpendicular to the palm points in the direction of F.'

In the given question, the magnetic force opposes the initial velocity v of the coin and thus it gradually decreases in a uniform pattern.