Electrical Circuits

141. The average value of a triangular or sawtooth wave is __________ times its peak value.

1. 0.577
2. 0.5
3. 0.318
4. 0.637

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142. The capacitance of a capacitor is relative permittivity.

1. Directly proportional to
2. Inversely proportional to
3. Equal to
4. Inversely proportional to the square of

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143. The capacitor opposes any change in voltage across it by

1. Passing a voltage proportional to the rate of change of current
2. Acting as a short circuit at time equal to zero
3. Passing a current proportional to the rate of change of voltage
4. Acting as a short circuit at time equal to infinity

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144. The charge in the capacitor is stored at the

1. Terminals
2. Plates
3. Dielectric
4. Air

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145. The charging of a capacitor through a resistance follows what law?

1. Linear law
2. Hyperbolic law
3. Inverse-square law
4. Exponential law

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146. The charging of a capacitor through a resistance obeys

1. Exponential law
2. Logarithmic law
3. Linear law
4. Square law

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147. The current is __________ times the maximum current at half-power points of a resonance curve.

1. 0.707
2. 1.414
3. 0.5
4. 0.632

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148. The curve between current and frequency is termed as

1. Voltage curve
2. Gain curve
3. Power curve
4. Resonance curve

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149. The distance between the 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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150. The electric field strength between capacitor plates has a unit of

1. Volts per meter
2. Volts per mil
3. Amperes per meter
4. Amperes per mil

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