Unanswered Electric Current Questions

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A parallel plate capacitor of area 60cm^2 and separation 3mm is charged initially at 90 micro coulomb. If the medium between the plates get slightly conducting and the plate loses charge initially at the rate of 2.5 *10^-8 C ...

the magnetic field due to current carrying circular loop of radius 3cm at a point on the axis at a distance of 4cm from the centre is 54 micro tesla. what will be its value at the centre of the loop ...