1. The signal is 5 sin (2 pi 2000 t + 60 degrees). The amplitude of this signal

Question

1. The signal is 5 sin (2 pi 2000 t + 60 degrees). The amplitude of this signal is

{5VPP, 3.535VPP, 3.535 VRMS, 3.535 VPK}

2. The signal is 1 sin (2 pi 500 t - 45 degrees). The frequency of this signal is

{1000Hz, 500Hz, 3140Hz, 1MHz}

3. The signal is 10 sin (2 pi 1000 t + 30 degrees). The phase shift of this signal is

{+60 degrees, +30 degrees, -30 degrees, -90 degrees}

4. The singal is 5 sin (2 pi 2000 t + 60 degrees). The voltage displayed on the DMM is

{5VPP, 3.535VPP, 3.535VRMS, 3.535VPK}

5. Inductive reactance is the opposition that an inductor shows to _______.

{alternating current, direct current, AC and DC, none of the above}

6. In an AC circuit with reactance XL in series with a resistor, the circuit current

{leads the applied voltage., lags the applied voltage., and voltage and the current are in phase., NO correct answer is listed.}

Explanation / Answer

1. 3.535 VRMS

explaination: Vrms = Vpeak X 0.707 = 5 X 0.707 = 3.535 V

2. 500 Hz

comparing it with A sin(2pi f t + phi) where f is the frequency we get f = 500 Hz

3. +30 degrees

4.3.535VRMS

digital multimeter always shows rms value on display

5.alternating current

6. lags the applied voltage since voltage of inductor is 90 degree ahead of voltage through resistor. Hence net voltage is ahead of current. Current is in the same direction as voltage across resistor.

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