What should be the frequency of alternating 200V so as to pass maximum current of 9A through an inductance of 1 henry.

An infinitely long straight current carrying wire produces a magnetic field B at a point at a distance 'a' from it. What must be the radius of the circular loop, so that for the same current through it the magnetic field at (i) its dentre equals B/2

An infinitely long straight current carrying wire produces a magnetic field B at a point at a distance 'a' from it. What must be the radius of the circular loop, so that for the same current through it the magnetic field at (II) an axial point, distant equal to the radius of the loop equals B?

What should be the maximum average velocity of water in a tube of diameter 25mm so that the flow is laminar?

An inductor of reactance 10Ω and resistance 10Ω are connected in series and the combination is connected to 200V, 50Hz supply. Find (i) current through the circuit and (ii) inductance of the coil.

Explain what is observed electric current is passed through a colloidal sol?