Electric Circuits
A series RLC circuit is connected across a 240V, 50 Hz supply. When the voltage across capacitor is 250V, a maximum current of 0.5A flows in the circuit. Find the resistance.

 500 Ohms.
 480 Ohms.
 100 Ohms.
 1000 Ohms.

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

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Electric Circuits
When we use super node technique

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

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