Answer the following questions:(a) A steady current flows in a metallic conductor of non-uniform cro @PhysicsMasterAcademy

Uploaded March 2026 | Updated September 2026, 3 weeks ago

Question No. 3.18- Answer the following questions:
(a)- A steady current flows in a metallic conductor of non-uniform cross-section. Which of these quantities is constant along the conductor: current, current density, electric field, drift speed?
(b)- Is Ohm's law universally applicable for all conducting elements? If not, give examples of elements which do not obey Ohm's law.
(c)- A low voltage supply from which one needs high currents must have very low internal resistance. Why?
(d)- A high tension (HT) supply of, say, 6 kV must have a very large internal resistance. Why?

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