railway RRB Technician Grade 1 Mock Test 2024 Physics Current, Resistance and Electricity Resistance and Resistivity
Consider the following statement:
a) Resistivity of conductor increases as temperature increases
b) Resistivity of the conductor decreases as temperature increases
c) If the length of the wire increases, its resistivity also increases
Which of the above statement is/are correct:
1
Only a is correct
2
Only b is correct
3
Both a and c are correct
4
Both b and c are correct