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Electric Circuits

Electric Circuits
Reciprocity condition for h parameters is

 h12 = - h21.
 h12 = h21.
 h11h22 - h21h12 = 0.
 h12 = h21.

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Electric Circuits
The strength of current in 1 H inductor changes at rate of 1 A / sec. Find the voltage across it?

 0.5 V.
 None of these.
 2 V.
 1 V.

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Electric Circuits
A parallel plate capacitor contain there dielectric layers of 1, 2 and 3 respectively and thickness of dielectric layers are 0.2 mm, 0.3 mm and 0.4 mm respectively. If area of plate is 20 cm2. What is the value of capacitance?

 None of them.
 30 pF.
 36.6 pF.
 32 pF.

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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.

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

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Electric Circuits
Final value theorem is not applicable for which of the following?

 stable systems
 unstable systems
 marginally stable systems
 Both 2 and 3

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Electric Circuits
Third pin of a 3 pin plug is thicker and longer

 for protection purpose.
 none of these.
 for designing purpose.
 all pins are of same size.

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