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Byju's Answer

Standard XII

Physics

Force on a Finite Wire

A rod of leng...

Question

A rod of length l with resistance R lies in a constant uniform magnetic field $\to B$ perpendicular to the rod. The surface is frictionless. The magnitude of the force that must be applied by a person to pull the rod at constant speed v is

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$B l v$

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$B l v / R$

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$B^{2} l^{2} v / R$

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Solution

The correct option is A
0

As rod is having no charge
$∴$ No force is require to pull the rod at constant velocity.

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A rod of length l with resistance R lies in a constant uniform magnetic field →B perpendicular to the rod. The surface is frictionless. The magnitude of the force that must be applied by a person to pull the rod at constant speed v is

The correct option is A 0 As rod is having no charge ∴ No force is require to pull the rod at constant velocity.

A rod of length l with resistance R lies in a constant uniform magnetic field $\to B$ perpendicular to the rod. The surface is frictionless. The magnitude of the force that must be applied by a person to pull the rod at constant speed v is

The correct option is A
0

As rod is having no charge
$∴$ No force is require to pull the rod at constant velocity.