A cyclotron operates with a given magnetic field and at a given frequency. If R denotes the radius of the final orbit, the final particle energy is proportional to:

the final particle energy is proportional to

Explanation:

The computation of the final particle energy is as follows;

As we know that

Energy is respect with the radious as

In the case when other quantities would remains the same or constant

So, the final particle energy is proportional to

The same is to be considered and relevant too

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

i think its c if i'm wrong