The power factor is a. sine 1. of the phase difference between voltage and curre

Question

The power factor is a. sine 1. of the phase difference between voltage and current. b. cosine c.tangent d. complex conjugate 2. The apparent power is the product of thevalues of voltage and current and is measured in a. Maximum, Watts b. rms, Watts c.Maximum, VoltAmperes d. rms, VoltAmperes 3. Add the given sinusoidal voltage waveforms and express in phasor form: v, 6 sin(3500t + 75°) V: V1 + V2 = a. 12.17 47 V v2-11.5 sin(3500t-427 V b. 9.49-51° V c. 10.27-10.65° V d. 15.12 21.270 v Multiply the given sinusoidal current waveforms and express the answer in phasor form: -5.3 sin(8000t+53°) mA; 2-2.6 sin(8000t+ 159) mA 4. 5. An effective value (i.e. rms value) is an equivalent dc value: it tells how many volts or amps of that a time-varying waveform is equal to in terms of its ability to producepower. a. instantaneous b. average c. reactive d. transient 6. Calculate the rms value of the following: a. V(t) = 10 + 9cos(100) + 6 sin(100t) b. the waveform below (10pts) Zo 10

Explanation / Answer

1) cosine

2) rms,volt amperes

3) v1=6<75 volts

v2=11.5<-42 volts

v1+v2=6<75+11.5<-42=10.276<-10.65182 volts.

10.27,-10.65

4)i1=5.3*10^-3<53 amps

i2=2.6*10^-3<15 amps

i1*i2=13.78*10^-6<68 amps

5) instantaneous power.

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