An electron is moving in a circle of radius 12 cm around a magnetic field of...

Question

Question

An electron is moving in a circle of radius 12 cm around a magnetic field of T. What is the speed of the electron?

Answer 1

Answer #1

speed of electron in magnetic field is given by cyclotron formula as

$v=\frac{qBr}{m}$

So, mass m and charge q of electron is known to us ,and r = 12cm = 0.12 m

and B value is missing in question So i take C

so,

$v=\frac{1.6\times 10^{-19}\times C\times 0.12}{9.1\times 10^{-31}}$

so we get

$v=2.1 \times 10^{10}C$

So plug in value of magnetic field in place of C to get speed of electron

Answer 2

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