| 1. | In a circuit containing R, L and C power loss can take place in ? | |
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R only
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L only
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C only
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all above
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Report Question| 2. | Power factor of an inductive circuit is usually improved by connecting capacitor to it in ? | |
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either C. or D.
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none of the above
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parallel
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series
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| 3. | A passive network is one which contains ? | |
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only two sources of e.m.f. in it
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no source of e.m.f. in it
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only variable resistances
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only some sources of e.m.f. in it
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| 4. | At ....... frequencies the parallel R-C circuit behaves as purely resistive ? | |
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high
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very high
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low
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very low
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| 5. | A sine wave has a frequency of 50 Hz. Its angular frequency is ...... radian/second ? | |
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25 ?
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5 ?
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100 ?
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50 ?
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| 6. | In A.C, circuits, laminated iron is invariably used in order to ? | |
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make assembly cheap and easier
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reduce circuit permeability
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reduce eddy current loss
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increase heat radiation
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| 7. | The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20?. If frequency is increased to 100 Hz, reactance becomes .... ohms ? | |
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10
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15
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2.5
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5
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| 8. | For the same peak. value which of the following waves will have the highest r.m.s. value ? | |
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triangular wave
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sine wave
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square wave
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half wave rectified sine wave
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| 9. | A non-linear network does not satisfy ? | |
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both homogeneity as well as superposition condition
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homogeneity, superposition and associative conditions
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superposition condition
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homogeneity condition
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| 10. | When two waves are in phase they have peak values at an interval of ? | |
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90
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180
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120
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none of the above
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