Ohm's Law - Ohm's Law objective questions (mcq) and answers

1.  Ohm's law is applicable to

   A. Semiconductors

   B. Vacuum tubes

   C. Carbon resistors

   D. None of these

2.  The condition for the validity of Ohm's law is that the

   A. Temperature should remain constant

   B. Current should be proportional to voltage

   C. Resistance must be wire wound type

   D. All of the above

3.  Ohm's law is not applicable to

   A. Semiconductors

   B. D.C. circuits

   C. Small resistors

   D. High currents

4.  Correct form of ohm's law

   A. I = VR

   B. V ∝ I

   C. V = IR

   D. Above B and C

5.  Ohm's law in point form in field theory can be expressed as

   A. V = RI

   B. J = E/σ

   C. J = σE

   D. R = ρl/A

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