Q.

Ohm’s law obeyed in -

A. a metallic conductor
B. a semi conductor
C. an electron tube
D. in all of the above
Answer» A. a metallic conductor
Explanation: There are, however, components of electrical circuits which do not obey Ohm's law; that is, their relationship between current and voltage (their I–V curve) is nonlinear (or non-ohmic).
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