Math Is Fun Forum

mathxyz

Member

From: Brooklyn, NY

Registered: 2024-02-24

Posts: 1,053

Foreign Voltage

In other countries, normal household voltage is 220 volts.It is acceptable for the actual voltage x to differ from normal by at most 8 volts.A formula that describes this is

| x - 220 | < or = 8

(a) Show that a voltage of 214 volts is acceptable.

(b) Show that a voltage of 209 volts is not acceptable.

Let me see. I assume thar this problem is just plug and chug.

Yes?

Bob

Administrator

Registered: 2010-06-20

Posts: 10,627

Re: Foreign Voltage

yes.

B

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

mathxyz

Member

From: Brooklyn, NY

Registered: 2024-02-24

Posts: 1,053

Re: Foreign Voltage

yes.

B

I suspected that this is just plug amd chug.
I can take it from here.

KerimF

Member

From: Aleppo-Syria

Registered: 2018-08-10

Posts: 248

Re: Foreign Voltage

Off topic:
A week ago, a customer ordered 3 mains voltage stabilizers (4 KW each) to work from 80 to 350V (50 Hz) and each to be protected in case of possible faulty neutral line (that is up to 400V), Fortunately, he didn't mind that the regulated output has to be, at best in this case, 220V +/- 15V.

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Every living thing has no choice but to execute its pre-programmed instructions embedded in it (known as instincts).
But only a human may have the freedom and ability to oppose his natural robotic nature.
But, by opposing it, such a human becomes no more of this world.

mathxyz

Member

From: Brooklyn, NY

Registered: 2024-02-24

Posts: 1,053

Re: Foreign Voltage

Off topic:
A week ago, a customer ordered 3 mains voltage stabilizers (4 KW each) to work from 80 to 350V (50 Hz) and each to be protected in case of possible faulty neutral line (that is up to 400V), Fortunately, he didn't mind that the regulated output has to be, at best in this case, 220V +/- 15V.

I am not an electrician. I attended and graduated from Electrician's Mate "A" School back in my Navy time in 1996. Of course, I have since forgotten the basic of those topics and reading circuit boxes.