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Answer the following questions: (a) A ...

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 cnducting elements ? If not, give examples of elements which do not obey Ohm's law.
(c ) A low voltage suply from which one needs high currents must have very low internal resistance.Why
(d) A high tension (HT) supply of say, 6kV must have a very large internal resistance, Why ?

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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?

Is Ohm's law universally applicable for all conducting elements ? If not, give examples of elements which do not obey Ohm's law.

A low voltage supply from which one needs high currents must have very low internal resistance. Why ?

Write Ohm's law

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