Recent content by Aya Elsayed

Thank you so much! This helped a lot :)

Let us consider a negatively charged object. We want to neutralize this object, so we touched it by our hands to remove the excess of negative charges by Grounding. Now the question is : Will our body (The Ground) be negatively charged as it gained those negative charges? then why it is called...

I got it ... So It only detects the voltage between the coil . So what I said about the sum of the voltages is right ?

When we turn the circuit off . There will be an induced emf through the coil due to the changing magnetic field of the AC . Therefore V=-L . DI/Dt So when the current is zero then the emf has a maximum value . And what about the emf of the source itself ? It's equal to the induced emf? If It...

Thank you all for help ..got it !

In which way?

It's written in my book that if you have two points having the same voltage then you'll cancel the resistance between them ... how can I know if the voltages of the two points are equal ...( The resistances are given in the circuit .)

Thanks! ... Eddy currents are induced in a metal when it feels a changing magnetic field . Then its internal temperature gets high and startes to melt . we apply that to the induction furnace... That's all what I knew about them .

There aren't any eddy currents in the metallic core of the galvanometer , Although it moves in a magnetic field? If it's right , why?