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EXERCISE CHAPTER 6
- Given the circuit in Figure 1, find the average power supplied or absorbed by each
element.
Figure 1
- A load consists of a 60 Ω resistor in parallel with a 90 μF capacitor. If the load is
connected to a voltage source, ݒ
௦
= 160 cos 2000ݐ V, find the average power
delivered to the load.
- Assuming that ݒ ௦
= 8 cos
in the circuit of Figure 2, find the average power
delivered to each of the passive elements.
Figure 2
- For the circuit in Figure 3, ݅ ௦
= 6 cos 10
ଷ
ݐ A. Find the average power absorbed by the
50 Ω resistor.
Figure 3
- In the circuit of Figure 4, determine the average power absorbed by the 40 Ω resistor.
Figure 4
6. A 110 V
rms
, 60 Hz source is applied to a load impedance, Z. The apparent power
entering the load is 120 VA at a power factor of 0.707 lagging.
(a) Calculate the complex power.
(b) Find the rms current supplied to the load.
(c) Determine Z.
(d) Assuming Z = R + jωL, find the values of R and L.
- An electrical load operates at 240 V rms . The load absorbs an average power of 8 kW at
a lagging power factor of 0.8. For this case, solve:
(i) Complex power of the load.
(ii) Impedance of the load.
- For the entire circuit in Figure 5, calculate:
(a) The power factor
(b) The average power delivered by the source
(c) The reactive power
(d) The apparent power
(e) The complex power
Figure 5
