# Recent questions in Electromagnetism and Electromagnetic Fields Theory

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A rod of length(, located along the y-axis has a total charge Q and a uniform linear charge density (. Find the electric potential at a point located on the x-axis a distance x from the origin.​
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Derive the equation of A)Q(t) for discharging processB)V(t) for discharging processC)I(t) for discharging processD)show discharging graphE)what happen for Q(t) for t=goes to +ve infinity for discharging processprocess.
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# Can somebody tell the difference between redshifted EM radiation and EM radiation of a longer wavelength under following scenario?

Generate photon A from relatively stationary point (on planet) and photon B from an object moving with lightspeed. Photon B wavelength would be shorter than A. Now, if somehow we can generate photon A with same wavelength as Photon B. Would it be possible to tell which one was generated on moving object?
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# keep the charges in equlibrium

two free +ve charge 4q and q are a distance "a" apart . what charges Q is needed to achieve equilibrium for entire system and where should it be placed from charge q???????????
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