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15 days ago

13

A magnetron in a microwave oven emits electromagnetic waves with a frequency f-2450 MHz. What magnetic field strength is require

d for electrons to move in circular paths with this frequency?

1 answer:

kicyunya [1K]15 days ago

6 0

Answer:

Magnetic field strength, B = 0.073 Tesla

Explanation:

The problem gives that a magnetron in a microwave oven emits electromagnetic waves at a frequency of 2450 MHz, $f=2450\times 10^6Hz$ .

We need to determine the magnetic field strength that allows electrons to orbit with this frequency.

The applicable formula is:

$B=\dfrac{m\omega}{q}$

Here, q represents the electron charge and m its mass.

$B=\dfrac{9.1\times 10^{-31}\times 2\pi (2450\times 10^6)}{1.6\times 10^{-19}}$

Calculating, we find B = 0.073 Tesla.

Therefore, this is the required magnetic field.

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