A cylindrical tube of length L has inner radius a and outer radius b as shown below in the figure
Given that ρ
is the resistivity of the material. Find the resistance of the tube between its ends.
are the temperature coefficient of the two resistors R1
at any temperature T0 0
C. Find the equivalent temperature coefficient of their equivalent resistance if both R1
are connected in series combination. Assume that α1
remain same with change in temperature
If a copper wire is stretched to make it .2% longer. Find the percentage change in the resistance
An electric current of 5 A passes through a circuit containing three wires(A,B,C) of the same material .Length of the wires in the circuit are in the ratio 2:3:4 And their diameters are in the ratio 3:4:5.Find the amount of current flowing in each branch of the circuit when wires are arranged in parallel combination
Find the equivalent resistance between point A and B in following combination of resistors
The current density across a cylindrical conductor of Radius A varies according to the following relation
is the constant vector across the length of the conductor and x is the distance from axis.
Find the current through cylindrical cross-section
Consider the figure given below
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
on the capacitors when steady state is reached with switch A open.
(b)Current in the circuit and charges Q1
on the capacitors when steady state is reached with switch A closed
Consider the infinite network of resistors as shown below in the figure
Each resistor in the infinite network has a value of 2Ω. Find the current drawn from 12V supply of internal resistance 0.5Ω.
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Class 12 Maths
Class 12 Physics