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LECTURE 24 Pick up lecture notes Pick up lecture notes

Average and root-mean-square Exercise 1: The average of the voltage signal shown is (a)Vo (b)0 (c)Vo/2 The rms of the voltage signal shown is a.) Vob.) 0 c.) Vo/2 d.) Exercise 1: The average of the voltage signal shown is (a)Vo (b)0 (c)Vo/2 The rms of the voltage signal shown is a.) Vob.) 0 c.) Vo/2 d.)

Exercise 2: The voltage signal is rectified” by eliminating negative voltages. The rms for the rectified signal is (a)0 (b)Vo (c)Vo/2 (d) The average for the rectified signal is a) 0b.) Vo c.) Vo/2d.) Exercise 2: The voltage signal is rectified” by eliminating negative voltages. The rms for the rectified signal is (a)0 (b)Vo (c)Vo/2 (d) The average for the rectified signal is a) 0b.) Vo c.) Vo/2d.) Rectified

Resistor in AC circuit Kirchhoff’s law Current in phase with voltage

Concept Test: As the frequency of the generator is increased, the average power dissipated in the resistor A)increases. B)does not change. C)may increase or decrease depending on the magnitude of the original frequency. Concept Test: As the frequency of the generator is increased, the average power dissipated in the resistor A)increases. B)does not change. C)may increase or decrease depending on the magnitude of the original frequency.

Inductor in AC circuit Voltage leads the current by 90 degrees X L : inductive reactance Effective resistance

Concept Test: As the frequency of the generator is doubled, the maximum current through the inductor A)increases by a factor of 2. B)does not change. C)decreases by a factor of 2. D)increases by a factor of 4. E)decreases by a factor of 4. Concept Test: As the frequency of the generator is doubled, the maximum current through the inductor A)increases by a factor of 2. B)does not change. C)decreases by a factor of 2. D)increases by a factor of 4. E)decreases by a factor of 4.

Capacitor in ac circuits Capacitative reactance Voltage lags the current by 90 degrees

Concept Test: The loudspeaker shown below receives from the amplifier both high and low frequency signals. Which speaker emits the high frequency signals: A)speaker 1 B)speaker 2 C)both speakers D)need more information. Concept Test: The loudspeaker shown below receives from the amplifier both high and low frequency signals. Which speaker emits the high frequency signals: A)speaker 1 B)speaker 2 C)both speakers D)need more information.