CUET Preparation Today
Which of the following statements is not true? |
Conductance is the reciprocal of resistance. Ohm's law is not applicable at very low and very high temperatures for conductors. Semiconductors obey Ohm's law. Ohm's law is not applicable to electron tubes, discharge tubes and electrolytes. |
Semiconductors obey Ohm's law. |
The correct answer is Option (3) → Semiconductors obey Ohm's law. Analysis of statements: → Conductance $G = 1/R$ → True → Ohm's law fails at very low and very high temperatures for conductors → True → Semiconductors generally do not obey Ohm's law strictly because their resistance changes with voltage and temperature → Not True → Ohm's law is not applicable to electron tubes, discharge tubes, electrolytes → True ∴ Statement not true: Semiconductors obey Ohm's law. |
