Recent content by darkprior

Thank you for your help and time

Yes they want the strength of magnetic induction, if it is zero, then fine I will write it as a solution. Now can you please give me a hint with identifying the direction and strength of the force acting on one meter of left bottom wire, please?

Homework Statement Hello, I have this problem: Four long straight parallel wires are placed in vacuum according to the picture, the distance between each wire is a = 20 cm. Through each wire flows electric current I = 20 A in the specified direction. What is the size and direction of magnetic...

I think I get it now... I put the "v*t" instead the "x" in the equation for capacity, multiply it by the voltage (U) and then derivate it following I=dQ/dt Or am I wrong? Anyways thank you for your clear explanation, it helped me a lot

But it doesn't cancel in the end because of the plus and minus in the equation

Homework Statement A flat capacitor formed by two square plates of side 0.3 m which are 2 mm apart. Source keeps voltage 250 V on the plates. What current flows between the plates and the source if the condenser is immersing in kerosene at velocity of 5 mm / s? The relative permittivity of...