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Electric Circuits

Electric Circuits
Which of the following elements is/are called dynamic element/s?

 R.
 Both L and C.
 L.
 C.

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Electric Circuits
Electric flux is proportional to

 rate of change of potential difference.
 potential difference between electrodes.
 rate of change of current.
 resistivity of medium.

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Electric Circuits
Capacitor does not allow the sudden change of

 current
 power
None of these
 voltage

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Electric Circuits
Three identical inductors are connected in delta with a 220 V, 50 Hz, 3 - φ, supply. If the phase current is 24 A, then what is the value of each of the inductance?

 0.049 H.
 None of these.
 0.058 H.
 0.029.

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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.
 2R.
 R.

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Electric Circuits
The equation for 25 cycles current sine wave having rms value of 30 amps, will be

 42.4sin50πt.
 30sin50πt.
 42.4sin25πt.
 30sin25πt.

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