An electron inside of a television tube moves with a speed of 2.80×107 m/sm/s . It encounters a region with a uniform magnetic field oriented perpendicular to its trajectory. The electron begins to move along a circular arc of radius 0.190 mm . What is the magnitude of the magnetic field?

The magnitude of the magnetic field is 0.83 T

Explanation:

Given :

Speed of electron inside television tube (v) = ×

Radius of electron moving path () = ×

According lorentz force in magnetic field is,

∴ ×

Where, = charge of electron, = speed of electron, = magnetic field and

= force on electron.

when electron is moving in circular orbit the force is given by,

∴

so we equate above both equation.

∴ ×

∴

∴ ××××××

∴ 0.83 Tesla

Therefore, the magnitude of the magnetic field is 0.83 T.

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explanation: