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Practice Questions on Electric current resistance and resistivity for JEE Main and Advanced







Paragraph Type Questions

Two concentric metal spherical shells of radius a and b respectively are separated by weakly conducting material of conductivity σ
A potential difference V is applied across the two shells
Question 1) Find the resistance between the shells
Practice Questions on Electric current resistance and resistivity for JEE Main and Advanced
Question 2 Find the electric field at  a distance r from the center
Practice Questions on Electric current resistance and resistivity for JEE Main and Advanced

Question 3
Consider the figure given below
Practice Questions on Electric current resistance and resistivity for JEE Main and Advanced
Where E=10V is a source of emf with internal resistance r=0.5Ω which is connected to two resistors R1=2Ω and R2=4Ω. Two capacitors C1=0.02µF and C2=0.05µF are connected in parallel to the resistors. Calculate
a)Current in the circuit and charges Q1 and Q­2 on the capacitors when steady state is reached with switch A open.
b)Current in the circuit and charges Q1 and Q­2 on the capacitors when steady state is reached with switch A closed
 
Question 4
Consider the infinite network of resistors as shown below in the figure
Practice Questions on Electric current resistance and resistivity for JEE Main and Advanced
Each resistor in the infinite network has a value of 2Ω. Find the current drawn from 12V supply of internal resistance 0.5Ω.
 
 


Solutions


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