Is there any case that we could face or find Voltage without Current and Current without Voltage?

NO..... USING OHMS LAW...... YES USING RMS

RMS?@ THONZE

omonighoblessing:
RMS?@ THONZE

YES ROOT MEAN SQUARE.

THONZE:
YES ROOT MEAN SQUARE.

oh thanks......let me properly look into it. thanks man.

NO WAHALA....OK WOMAN...

I was surfing through the thread and stumbled upon this. Decided to comment because of the previous reply. Basically, what Iam gonna do is simply throw more light on the issue.
Show Why there's no correlation between the previous reason given and the question, then further Answer question as subjectively as I can be.

Root-mean-square is a term used to quantify varying quantities. This should tell us that it is not peculiar to electrical engineering.
However as it is possible to obtain varying electrical quantities such as voltage,current et.al. it becomes logical in applications to apply RMS as it gives quantitatively a very good application in power Consumptions..
Now back to your question. Can there be a voltage without a current?what we are talking here is electrical current.
Before answering this it's important you recognise why materials are sometimes basically grouped into conductors, semiconductors, insulators
Simply put there can be voltage without current For an insulator or a relatively bad conductor.
Why? Current is simply a flow of electrical charges.
Now what happens when the voltage isn't enough to make charges flow? Good guess. they don't and as such constitutes no current. This is what culminates in the idea of resistance. .
Its analogous to saying. .we know that it requires 5 men to pushstart a particular car. And I ask what if four pushes?Well it's simple; nothing happens..
Bottom line is it's possible to have voltage without current up to the materials dielectric strength. Or saying it the other way round, it's conductivity coefficient.
Current can flow through any material just with the right voltage to cause a dielectric breakdown. A common case is a spark or a lightning strike. Where current flows through air. so you see. If a voltage of say a few hundred volts is applied through air. Current wouldnt flow.. Thus in this simple case there's voltage but no current flows.
I hope this clears your doubt.

For the second question.
Trying to speak from a general point, there's no direct and straightforward answer for which we would give a yes or a no.
For ordinary level applications, we like to restrict ourselves to the notion that there can't be a currently flow without a voltage source.
However, this idea is simply defeated by studies of SUPERCONDUCTIVITY and it's allied research areas.
Where it's possible to find materials that we hope conducts I.e current flows at zero voltage.
Also, I do not know how advanced you are in your studies of electrical engineering if you happen to. Or any related area of interest. I would like you to look at DISPLACEMENT CURRENTS. in Maxwell's laws.
In conclusion its possible for there to be a current without a voltage source.
Before I forget,almost did. There's what is referred to as drift current in semiconductors. Simply caused by charge diffusion to obtain charge equilibrium throughout the material. This is a current. But there's no voltage.
I hope I have helped.