| 1. | Selectivities of different resonance circuits are compared in terms of their ? | |
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impedances
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reactance
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frequencies
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bandwidths
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Report Question| 2. | A coil with large distributed capacitance has a ? | |
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high resonant frequency
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low resonant frequency
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low quality factor
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low resistance
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| 3. | The series element of a band stop filter is ? | |
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capacitive
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inductive
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parallel combination of L and C
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series combination of L and C
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| 4. | In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will ? | |
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be reduced by half
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be doubled
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be four times at high
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be reduced to one fourth
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| 5. | Which of the following refers to a parallel circuit ? | |
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The current through each element is same
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The voltage across element is in proportion to its resistance value
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The equivalent resistance is greater than any one of the resistors
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The current through any one element is less than the source current
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| 6. | The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of ? | |
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iron loss in core
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skin effect
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increase in temperature
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capacitive effect between adjacent coil turns
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| 7. | Time constant of a circuit is the tune in seconds taken after the application of voltage each ? | |
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25% of maximum value
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50% of maximum value
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63% of maximum value
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90% of the maximum value
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| 8. | Time constant of an inductive circuit ? | |
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increases with increase of inductance and decrease of resistance
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increases with the increase of inductance and the increase of resistance
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increases with the decrease of inductance and decrease of resistance
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increases with decrease of inductance and increase of resistance
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| 9. | Time constant of an inductive circuit ? | |
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increases with increase of inductance and decrease of resistance
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increases with the increase of inductance and the increase of resistance
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increases with the decrease of inductance and decrease of resistance
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increases with decrease of inductance and increase of resistance
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| 10. | A pure inductance connected across 250 V, 50 Hz supply consumes 100 W. This consumption can be attributed to ? | |
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the big size of the inductor
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the reactance of the inductor
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the current flowing in the inductor
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the statement given is false
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