current-electricity Question 3
Question: Q. 3. A metal rod of length
(a) maximum when the battery is connected across
(b) maximum when the battery is connected acyoss
(c) maximum when the battery is connected across
ใf Very Shorf Answer Type Questions
(1 mark each)
Q. 1. Define the conductivity of a conductor. Write its SI unit. R [O.D. Compt I, II, III 2017]
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Solution:
Ans. Definition
SI Unit
Conductivity is reciprocal of resistivity
SI unit :
[CBSE Marking Scheme, 2017]
Detailed Answer :
Conductivity of a conductor is the reciprocal of its resistivity i.e.,
SI unit of conductivity is siemens per metre and is represented as
[NCERT Exemplar]
Ans. Correct option : (a)
Explanation: As we know that,
The maximum resistance will be achieved when the value of
