| 1. | The phase difference between voltage 1 and current wave through a circuit element is given as 30'. The essential condition is that ? | |
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both waves must have zero value at the same time
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both waves must have same frequency
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both waves must have identical peak values
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none of the above
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Report Question| 2. | In a series resonant circuit, the impedance of the circuit is ? | |
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zero
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minimum
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maximum
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none of the above
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| 3. | A capacitor is generally a ? | |
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linear and bilateral component
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non-linear and active component
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bilateral and active component
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active, passive, linear and non linear component
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| 4. | The power is measured in terms of decibles in case of ? | |
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current transformers
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auto-transformers
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electronic equipment
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transformers
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| 5. | According to Kirchhoff's voltage law, the algebraic sum of all IR drops and e.m.fs. in any closed loop of a network is ? | |
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determined by battery e.m.fs.
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zero
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negative
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positive
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| 6. | Magnitude of current at resonance in R-L-C circuit ? | |
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depends upon the magnitude of
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depends upon the magnitude of R, L and C
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depends upon the magnitude of R
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depends upon the magnitude of L
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| 7. | Wire-wound resistors are unsuitable for use at high frequencies because they ? | |
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consume more power
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exhibit unwanted inductive and capacitive effects
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create more electrical noise
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are likely to melt under excessive eddy current heat
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| 8. | Power factor of an electrical circuit is equal to ? | |
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kW/kVA
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ratio of useful current to total current Iw/I
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R/Z
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all above
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| 9. | In a highly capacitive circuit the ? | |
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reactive power is more than the actual power
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actual power is more than its reactive power
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apparent power is equal to the actual power
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reactive power is more than the apparent power
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| 10. | Time constant of a capacitive circuit increase with the ? | |
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decrease of capacitance and decrease of resistance
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decrease of capacitance and in crease of resistance
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increase of capacitance and decrease of resistance
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increase of capacitance and in crease of resistance
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