Electrical Circuits

131. Rationalizing the denominator of a complex number means

1. Eliminating the j component in the denominator
2. Adding j component in the denominator
3. Eliminating the j component in the numerator
4. Adding j component in the numerator

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132. Refers specifically to steady state values of quantities in ac circuits which are complex numbers.

1. Domain
2. Scalar quantity
3. Vector quantity
4. Phasor quantity

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133. Refers to the outward-curving distortion of the lines of force near the edges of two parallel metal plates that form a capacitor.

1. Skin effect
2. Night effect
3. Edge effect
4. Hall effect

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134. Resistor with colored bands in the body

1. Wire-wound resistor
2. Carbon-composition resistor
3. Potentiometer
4. Rheostat

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135. Series resonance occurs when

1. XL = XC
2. XL = R
3. Z = R
4. Both A and C

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136. Series resonant circuit is sometimes known as

1. Rejector circuit
2. Acceptor circuit
3. Inductive circuit
4. Capacitive circuit

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137. The __________ of an alternating quantity is defined as the fractional part of a period or cycle through which the quantity has advanced from selected origin.

1. Phase
2. Frequency
3. Amplitude
4. Waveform

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138. The admittance of a parallel RLC circuit is found to be the __________ sum of conductance and susceptances.

1. Algebraic
2. Arithmetic
3. Vector
4. Phasor

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139. The arc across a switch when it open an RL circuit is a result of the

1. Large self-induced voltage across L
2. Long time constant
3. Low resistance of the open switch
4. Surge of resistance

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140. The area of capacitor plates increases two times, then its capacitance

1. Increases two times
2. Increases four times
3. Decreases two times
4. Decreases four times

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