Electrical Circuits

171. The ratio of the flux density to the electric field intensity in the dielectric is called

1. Permittivity
2. Field intensity
3. Permeability
4. Elasticity

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172. The ratio of W/VA in an ac circuit means

1. Power factor
2. Reactive factor
3. Quality factor
4. Load factor

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173. The reactance curve is a plot of frequency versus __________ for a series RLC circuit

1. Current
2. Voltage
3. Gain
4. Impedance

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174. The reason why alternating current can induce voltage is

1. It has high peak value
2. It has a stronger magnetic field than direct current
3. It has a constant magnetic field
4. It has a varying magnetic field

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175. The reason why electrical appliances are connected in parallel.

1. It is a simple circuit
2. This makes the operation of appliances independent with each other
3. This results in reduced power consumption
4. All of the above

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176. The reason why electrical appliances are not connected in series.

1. Greater electrical power saving
2. Power loss is minimum
3. Appliances have different current ratings
4. All of the above

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177. The reciprocal of a complex number is

1. A complex number
2. A real number
3. An imaginary number
4. A whole number

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178. The resistance of an insulator when its temperature is increased.

1. Decreases
2. Remains the same
3. Increases
4. Varies

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179. The result of rust in electrical (wire) connection is

1. Inductance
2. Conductance
3. Impedance
4. Resistance

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180. The rms value of a triangular or sawtooth waveform is __________ times its peak value.

1. 0.577
2. 0.5
3. 0.25
4. 0.707

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