Rank the transformers on the basis of their rms secondary voltage.

Rank from largest to smallest. To rank items as equivalent, overlap them.

#1

Vp=240V
Np=1000turns
Ns=2000turns

#2

Vp=480V
Np=4000turns
Ns=2000turns

#3

Vp=480V
Np=2000turns
Ns=1000turns

#4

Vp=120V
Np=500turns
Ns=2000turns

#5

Vp=240V
Np=1000turns
Ns=500turns

Explanation:

Given:

Here the symbols used mean:

voltage in the primary coil

voltage in the secondary coil

no. of turns in the secondary coil

no. of turns in the primary coil

We know that the above quantities are related as:

So, we rank:

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach