Q.1
A three-phase ∆-connected generator is driving a balanced load such that each phase current is 12 A in magnitude. When I θa = 12 ∠30° A, what are the polar expressions for the other phase currents?
Q.2
In the transformer the function of a conservator is to
Q.3
A balanced load is one in which all the impedances are equal.
Q.4
A constant load power means a uniform conversion of
Q.5
A single-phase sinusoidal voltage of 120 V is connected to a 90 Ω load. Current in the circuit is
Q.6
The term 'squirrel-cage' applies to a type of three-phase ac generator.
Q.7
A simple three-phase generator consists of three conductive loops separated by 120°.
Q.8
In a three-phase system, the voltages are separated by
Q.9
Polyphase generators produce simultaneous multiple sinusoidal voltages that are separated by
Q.10
In a Y-connected circuit, the magnitude of each line current is
Q.11
In a certain three-wire Y-connected generator, the phase voltages are 2 kV. The magnitudes of the line voltages are
Q.12
In a certain Y-Y system, the source phase currents each have a magnitude of 9 A. The magnitude of each load current for a balanced load condition is
Q.13
In a ∆-connected source driving a ∆-connected load, the
Q.14
In a Y-Y source/load configuration, the
Q.15
In a ∆-connected generator, there is a 120° difference between each line current and the nearest phase current.
Q.16
In a Y-connected generator, there is a 120° difference between each line voltage and the nearest phase voltage.
Q.17
A simple two-phase generator consists of two conductive loops separated by 90°, rotating in a magnetic field.
Q.18
In a balanced three-phase load, each phase has
Q.19
If in a Y-connected ac generator, each phase voltage has a magnitude of 90 VRMS, what is the magnitude of each line voltage?
Q.20
Polyphase is characterized by two or more sinusoidal voltages, each having a different phase angle.
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