Basic Electrical Engineering

101. Three capacitors are connected in series having capacitance of 8uF, 32uF, 16uF, the total capacitance is

1. 32/7 uF
2. 7.32 uF
3. 56 uF
4. 32 uF

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102. Three equal resistance of magnitude 5 Ohm each are connected in delta. The resistance between any two pair of terminals of the delta will be

1. 5 Ohm
2. 5/3 Ohm
3. 10/3 Ohm
4. 3/5 Ohm

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103. Three phase ac supply

1. Has sawtooth waves that add together in phase
2. Consists of three sine waves in different phases
3. Is a sine wave with exactly three harmonics
4. Is of interest only to physicists

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104. Two pure sine waves that differ in phase by 180: can be considered to

1. Be offset by two full cycles
2. Be in phase opposition
3. Be separated by less than ¼ cycle
4. Have a frequency of ½ cycle

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105. Voltage regulation can be achieved by a zener diode connected in

1. parallel with the filter output, forward biased
2. parallel with the filter output, reverse biased
3. series with the filter output, forward biased
4. series with the filter output, reverse biased

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106. Watt hour is the unit of

1. Electric power
2. Electric capacity
3. Electric energy
4. Electric charge

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107. We can add or subtract a ….degrees of phase to or from a wave, and end up with exactly the same wave again

1. 90
2. 180
3. 270
4. 360

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108. What is the angular frequency of the ac signal having a frequency of 1770Hz

1. 1770 rad/s
2. 11,120 rad/s
3. 282 rad/s
4. Data insufficient

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109. when a non zero net reactance exists in an ac circuit, the apparent power is

1. Zero
2. Equal to the true power
3. Less than the true power
4. Greater than the true power
5. Infinite

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110. When an electrical charge exists but there is no flow of current, the charge is said to be

1. ionizing
2. electronic
3. Static
4. Atomic

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