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Network Analysis
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1. Calculate the amount of power dissipated by this electric
heating element,if the
generator's output voltage is 110 volts and the heater's
resistance is 2.5.
Now, calculate the power dissipated by the same heater if the
generator's
output voltage is doubled
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Solution:
4,840 watts at 110 volts
19,360 watts at 220 volts
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2. Determine the phase angle ()of the current in this
circuit,
with respect to the supply voltage:
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Solution:
= 26.51o
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3. Suppose you are building a circuit and you need an
impedance of 1500 -41oat a frequency of 600 Hz. What
combination of components could you connect together in
series to achieve this precise impedance?
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Solution:
A 1132.1 resistor connected in series with a 269.6 mF
capacitor
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4. An AC electric motor operating under loaded conditions draws
acurrent of 11 amps (RMS) from the 120 volt (RMS) 60 Hz
power lines. The measured phase shift between voltage andcurrent
for this motor is 34o, with voltage leading current.
Determine the equivalent parallel combination of resistance
(R) and inductance (L) that is electrically equivalent to
thisoperating motor.
In the parallel LR circuit, the resistor will dissipate a lot
of
energy in the form of heat. Does this mean that the electric
motor, which is electrically equivalent to the LR network,will
dissipate the same amount of heat? Explain why or why
not.
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Solution:
Rparallel= 13.16
Lparallel= 51.75 mH
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THANK YOU
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