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Electric Circuits

Electric Circuits
For ideal tank circuit, what is the value of dynamic admittance?

None of these
 0
 ∞
 Both

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Electric Circuits
A wire of resistance R has it length and cross - section both doubled. Its resistance will become

 4R.
 0.5R.
 R.
 2R.

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Electric Circuits
Active materials of a lead acid cell are

 all of above.
 spongy lead.
 dilute H2SO4.
 lead peroxide.

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Electric Circuits
For closer tolerance which of the following capacitors is usually preferred?

 None of them.
 Ceramic disc capacitor.
 Mica capacitor.
 Paper capacitor.

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Electric Circuits
If all the elements in a particular network are linear, then the superposition theorem would hold, when the excitation is

 Either AC or DC
 An Impulse
 AC only
 DC only

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Electric Circuits
A wire 2.5 m long is bent into a square. An current of 100 A flowing through the wire will produce a magnetizing force at the center of the square, equal to

 144 AT / m.
 72 AT / m.
 196 AT / m.
 222 AT / m.

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