| 1. | Poor power factor ? | |
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overloads alternators, trans formers and distribution lines
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results in more voltage drop in the line
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reduces load handling capability of electrical system
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results in all above
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Report Question| 2. | The r.m.s. value and mean value is the same in the case of ? | |
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square wave
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half wave rectified sine wave
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triangular wave
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sine wave
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| 3. | The power factor at resonance in R-L-C parallel circuit is ? | |
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0.08 lagging
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unity
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zero
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0.8 leading
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| 4. | Which of the following statements pertains to resistors only ? | |
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connecting them in parallel in creases the total value
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oppose sudden changes in voltage
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can dissipate considerable amount or power
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can act as energy storage devices
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| 5. | The square waveform of current has following relation between r.m.s. value and average value ? | |
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r.m.s. value of current is less than average value
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r.m.s. value of current is greater than average value
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r.m.s. value of current is equal to average value
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none of the above
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| 6. | For high efficiency of transfer of power, internal resistance of the source should be ? | |
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more than the load resistance
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less than the load resistance
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equal to the load resistance
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none of the above
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| 7. | Time constant of an inductive circuit ? | |
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increases with decrease of inductance and decrease of resistance
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increases with decrease of inductance and increase of resistance
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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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| 8. | If the energy is supplied from a source, whose resistance is 1 ohm, to a load of 100 ohms the source will be ? | |
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a current source
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a voltage source
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both of above
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none of the above
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| 9. | What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value ? | |
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90°
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180°
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0°
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45°
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| 10. | Inductance affects the direct current flow ? | |
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at the time of turning on and off
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at all the time of operation
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only at the time of turning off
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only at the time of turning on
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