| 1. | A sine wave of voltage varies from zero to maximum of 200 V. How much is the voltage at the instant of 30' of the cycle ? | |
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100 V
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173.2 V
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50 V
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82.8.V
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Report Question| 2. | Skin effect occurs when a conductor N carries current at .... frequencies ? | |
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medium
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high
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very low
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low
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| 3. | In the case of an unsymmetrical alternating current the average value must always be taken over ? | |
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the half cycle
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the whole cycle
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unsymmetrical part of the wave form
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the quarter cycle
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| 4. | In a series circuit on resonance, following will occur ? | |
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Z = R
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V = Vc
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V = VR
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all above
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| 5. | Any number of current source in parallel may be replaced by a single current source whose current is the algebraic sum of individual source currents and source resistance is the parallel combination of individual source resistances". The above statement is associated with ? | |
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Maximum theorem power transfer
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Thevenin's theorem
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Millman's theorem
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None of the above
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| 6. | The r.m.s. value of a sine wave is 100 A. Its peak value is ? | |
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150 A
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282.8 A
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70.7 A
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141.4 A
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| 7. | In a sine wave the slope is constant ? | |
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between 180° and 270°
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between 0° and 90°
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between 90° and 180°
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no where
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| 8. | The time constant of the capacitance circuit is defined as the time during which voltage ? | |
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rises to 63.2% of its final steady value
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falls to 36.8% of its final steady value
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rises to 38.6% of its final steady value
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none of the above
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| 9. | Which of the following is the passive element ? | |
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Ideal voltage source
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All of the above
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Capacitance
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Ideal current source
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| 10. | In a series parallel circuit, any two resistances in the same current path must be in ? | |
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series with the voltage source
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parallel with the voltage source
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series with each other
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parallel with each other
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