EE SHORT NOTES AC FUNDAMENTALS 4
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Attempt Free EE SHORT NOTES AC FUNDAMENTALS 4 Here. Read The Important Electrical MCQ From Below.
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61
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Form factor is the ratio of
r.m.s. value/average value [other wrong options are – Average value/r.m.s. value, Average value/peak value, r.m.s. value/peak value, ] |
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62
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The peak value of a sine wave is 200 V. Its average value is
127.4V [other wrong options are – 141.4V, 282.8V, 200 V, ] |
EE SHORT NOTES AC FUNDAMENTALS 4
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63
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The reflection co-efficient of the simplest standing wave is
1 [other wrong options are – +1, Zero, Infinity, ] |
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64
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A parallel resonant circuit can be used
Both (A) and (B) [other wrong options are – As a high impedance, To reject a small band of frequencies, To amplify certain frequencies, ] |
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65
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In an A.C. circuit I sin Φ is called
Wattless component [other wrong options are – Active component, Any of the above, None of these, ] |
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66
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The negative maximum of a cosine wave occurs at
180 [other wrong options are – 30, 45, 90, ] |
EE SHORT NOTES AC FUNDAMENTALS 4
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67
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In a parallel R-C circuit, the current always ____the applied voltage.
Leads [other wrong options are – Lags, Remains in phase with, None of the above, ] |
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68
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Power factor of electric bulb is
Unity [other wrong options are – Zero, Lagging, Leading, ] |
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69
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Power factor of the following circuit will be unity
Resistance [other wrong options are – Inductance, Capacitance, Both (A) and (B), ] |
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70
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The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of____ degrees
45 [other wrong options are – 90, 60, 30, ] |
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71
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For a sine wave with peak value Imax the r.m.s. value is
0.707 Imax [other wrong options are – 0.5 Imax, 0.9 Imax, 1.414 Imax,] |
EE SHORT NOTES AC FUNDAMENTALS 4
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72
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A heater is rated as 230 V, 10 KW, AC. The value 230 V refers t
r.m.s. voltage [other wrong options are – Average voltage, Peak voltage, None of these, ] |
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73
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The form factor of D.C. supply voltage is always
Unity [other wrong options are – Zero, 0.5, Infinite, ] |
|
74
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The dual of a link is
Tree branch [other wrong options are – Twig, Node, Loop, ] |
|
75
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The power factor of a series R-L-C circuit at its half-power points is
Lagging or leading [other wrong options are – Unity, Lagging, Leading, ] |
EE SHORT NOTES AC FUNDAMENTALS 4
|
76
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What inductance will give the same reactance as a capacitor of 2 µF when both are at 50 Hz?
5 H [other wrong options are – 10 H, 15 H, 20 H, ] |
|
77
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The frequency of domestic power supply in India is
50 Hz [other wrong options are – 200 Hz, 100 Hz, 60 Hz, ] |
|
78
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In an A.C. circuit power is dissipated in
Resistance only [other wrong options are – Inductance only, Capacitance only, None of the above, ] |
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79
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In a purely inductive circuit
Actual power is zero [other wrong options are – Reactive power is zero, Apparent power is zero, None of these, ] |
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80
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Power factor of the following circuit will be zero
Both (B) and (C) [other wrong options are – Resistance, Inductance, Capacitance, ] |
EE SHORT NOTES AC FUNDAMENTALS 4
