Chapter 32: Q. 14 (page 924)
a. Evaluate in figure at emf frequencies
b. Graph versus frequency. Draw a smooth curve through your five points.

Short Answer
Part(a)at emf frequencies are respectively.
Part(b) Required figure is given below.
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Chapter 32: Q. 14 (page 924)
a. Evaluate in figure at emf frequencies
b. Graph versus frequency. Draw a smooth curve through your five points.

Part(a)at emf frequencies are respectively.
Part(b) Required figure is given below.
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A series RLC circuit with a resistor dissipates when attached to a power line. What is the power factor?
a. For an RC circuit, find an expression for the angular frequency at which .
b. What is VR at this frequency ?
A generator consists of a by rectangular loop with turns of wire spinning at z in a uniform magnetic field. The generator output is connected to a series RC circuit consisting of a resistor and a capacitor. What is the average power delivered to the circuit?
Commercial electricity is generated and transmitted as three-phase electricity. Instead of a single emf , three separate wires carry currents for the emfs . This is why the long-distance transmission lines you see in the countryside have three parallel wires, as do many distribution lines within a city.
a. Draw a phasor diagram showing phasors for all three phases of a three-phase emf.
b. Show that the sum of the three phases is zero, producing what is referred to as neutral. In single-phase electricity, provided by the familiar electric outlets in your home, one side of the outlet is neutral, as established at a nearby electrical substation. The other, called the hot side, is one of the three phases. (The round opening is connected to ground.)
c. Show that the potential difference between any two of the phases has the rms value where
is the familiar single-phase rms voltage. Evaluate this potential difference for
. Some high-power home appliances, especially electric clothes dryers and hot-water heaters, are designed to operate between two of the phases rather than between one phase and neutral. Heavy-duty industrial motors are designed to operate from all three phases, but full three-phase power is rare in residential or office use.
The emf phasor in FIGURE EX32 .1 is shown at.
a. What is the angular frequency ? Assume this is the first rotation.
b. What is the peak value of the emf?

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