Electric Circuits
The resistivity of the conductor depends on

 none of these.
 length of the conductor.
 area of the conductor.
 type of material.

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Electric Circuits
A battery of E Volts is supplying a steady current to a series circuit of total resistance RΩ and inductance L Henry. A part R1 of the total resistance is suddenly short circuited. Find the expression for current flowing through the battery subsequent to the operation.

 i = {E / R}[1-(R1 / R) *e - {(R - R1 )*t/L}
 i = {E / R1 - R)}(1- e - (R1 - R) t / L)
None of these
 i = {E / (R - R1)}[1-(R1 / R) *e- {(R - R1 )t/L}

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Electric Circuits
When we use super node technique

All of these
 ideal voltage source is connected between non reference node and reference.
 ideal voltage source is connected between two non reference nodes.
 current source branch is common for two meshes.

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