Question

Assertion (A): V-I graph for Si is non-linear
Reason(R): Semiconductor doesn't obey ohm's law
1. Both A and R are correct and R is correct explanation of A
2. Both A and R are correct and R is not correct explanation of A
3. A is correct but R is incorrect
4. A is incorrect but Ris correct.​

Answer 1

Answer:

option 1.is correct

Explanation:

1. because si is not a metal
2. v-i graph is non linear for non metal ,semiconductor

Answer 2

Both A and R are correct and R is correct explanation of A. (option 1)

• The V-I graph or the potential difference vs current graph gives the resistance of a conductor at any point. The slope of the curve gives the resistance.
• The curve is linear only in the case of metals or the substances which obey Ohm's law. Since silicon (Si) is a metalloid or semiconductor, the curve is not linear.
• The non-linear curve represents the increase in conductivity of Si when temperature is increased. This means resistance decreases. Hence, semiconductors donot obey Ohm's law.