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Electric Circuits

Electric Circuits
Current magnification will occur in which of the following case?

 Parallel resonance
 Series resonance
None of these
 Both

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Electric Circuits
When a lossy capacitor with a dielectric of permittivity ε and conductivity σ operates at a frequency ω the loss tangent for the capacitor is given by

 ω ε/σ.
  σ/ω ε.
 σ ω ε.
 ω σ/ε.

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Electric Circuits
In a capacitive circuit, the capacitive reactance is

 directly proportional to the square of frequency
 indirectly proportional to frequency
 directly proportional to frequency
 indirectly proportional to the square of frequency

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Electric Circuits
Power factor can be defined as

 ratio of resistance versus impedance.
 both option B and C.
 sine of voltage and current.
 cosine of angle between voltage and current.

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Electric Circuits
Three resistances of two ohms each are connected in star. In the equivalent delta representation each resistance will have a value of _______________ Ω.

 3.4.
 6.
 5.2.
 0.6.

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Electric Circuits
Which of the following quantities consists of SI unit as WATT ?

 Current
 Force
 Charge
 Power

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