Back to CURRENT ELECTRICITY
JEE PHYSICS MCQ: CURRENT ELECTRICITY
1
Medium
1 of 1
Understanding
+4 | -1
A cylindrical metal wire of length and cross sectional area , has resistance , conductance , conductivity σ and resistivity . Which one of the following expressions for is valid
View answer and explanation
Correct option: A
Option A () is correct because it correctly relates conductivity to conductance, resistance, and resistivity.
More Questions from CURRENT ELECTRICITY
Practice All Chapter MCQs →
The specific resistance of a wire is , its volume is and its resistance is , then its length will be
Magnitude of drift velocity per unit electric field is
Statement-1: If a resistor is connected to a battery the current decreases when the temperature increases.
Statement-2: For most of the resistors, resistance increases with increase in temperature. The reciprocal of resistance is Corresponding to the resistance , which is order of colour coding on carbon resistors? In a meter bridge, the gaps are closed by resistance 2 and 3 ohms. The value of shunt to be added to 3 ohm resistor to shift the balancing point by is
Statement-2: For most of the resistors, resistance increases with increase in temperature. The reciprocal of resistance is Corresponding to the resistance , which is order of colour coding on carbon resistors? In a meter bridge, the gaps are closed by resistance 2 and 3 ohms. The value of shunt to be added to 3 ohm resistor to shift the balancing point by is