A couple of questions about 50Ω load

[Externet]

Hi all. Need help with these :

A 50Ω load has 70.7V across it, supplied by a 50Ω source.
How to calculate a second load added in parallel to the existing 50Ω load that will cause the loads voltage drop to 54 V?

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A 50Ω load has 70.7V across it, supplied by a 50Ω source.
Does it mean the supply is actually 141 Volts ?

 

[betwixt]

Re: A couple of questions...

It would appear so.

You need to calculate the new load resistance that drops the voltage to 54V then work out the resistance needed in parallel with the existing 50 Ohms to achieve it.

The initial voltage is 141.4V
The total new load resistace has to be 30.9 Ohms
The resistace needed in parallel with 50 Ohms to make 30.9 Ohms is therefore 76.8 Ohms.

Brian.