Statistics for Generators and Power Distribution

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General Stats

This quiz has been taken 7 times
The average score is 16 of 46

Answer Stats

Question	Answer	% Correct
What do generators transform mechanical kinetic energy into?	Electrical energy	100%
In that situation what would the graph of emf as a function of time look like?	A sine curve	57%
Massive power losses are experienced when what has a large magnitude?	Current	57%
How many output lines come out of the generator?	Four	57%
This is because of the equation P=__.	IV	57%
Is it possible to have an ideal transformer?	No	57%
What are the names of the two coils in a transformer?	Primary	57%
	Secondary	57%
Therefore before transmission, what type of transformer is used?	Step-up	57%
Due to the priniciple of conservation of energy, when voltage is increased, what is the trade-off which decreases?	The current	57%
How many pairs of sets of coils are there in a typical power station generator?	Three	57%
What do transformers change?	Voltage	57%
What is the magnitude of voltage sent to houses for domestic consumption in Australia?	240V	43%
What does a DC generator have the same components as?	A DC motor	43%
In simple generators, what do coils of wire rotate inside of?	A magnetic field	43%
	Amplitude	43%
What separates/unites the coils?	An iron core ring	43%
Along with an electrical generator, what is used in wind, steam and water power stations to generate electricity?	A turbine	43%
If the induced emf is doubled, what parts of the curve also double?	Frequency	43%
Pp=Ps (where P is power). Therefore Vp/Vs=_____	Is/Ip	43%
What does a DC generator use instead?	Split ring commutator	43%
Due to its large mass, the coils in a power station generator are stationary, so what rotates?	The electromagnets	43%
In the Tesla/Westinghouse vs Thomas Edison feud, who supported DC systems?	Thomas Edison	43%
If the rotation is constant, what would a graph of the change in flux as a function of time look like?	A cosine curve	29%
An emf signal placed across a resistor would create an ___________ _______.	Alternating current (AC)	29%
Faraday's Law of induction states induced emf is equal to the change in magnetic flux over the ______ __ ____.	Change in time	29%
The magnetic field in the stator can be produced by what other than permanent magnets?	Electromagnets	29%
^ is split into many layers separated by laminate, what does this prevent?	Large eddy currents	29%
What changes as the coil rotates to produce a changing electromotive force in a generator?	Magnetic flux	29%
In a DC generator, what switches sides when the emf's direction is reversed?	The brushes	29%
What line acts as a continuous lightning conductor and prevents faults from altering the power grid?	The earth line	29%
To show the danger of his competitor's system, what did Edison's company invent?	The electric chair	29%
If Vp is the voltage of the primary coil, s represents the secondary coil, and n represents the number of turns in the coil, what equation shows their relationship in an ideal transformer?	Vp/Vs=np/ns	29%
In Australia, pole transformers drop the voltage down to what value for industrial areas?	415V	14%
The deciding factor in the battle for power supply control was when what location was fought over for power supply?	Niagara Falls	14%
In AC generators, what connects the rotor to the external terminals?	Slip rings	14%
What is the last line known as?	The ground line	14%
What dictates whether it is a step-up or step-down transformer?	The number of turns in the coils	14%
Which company won the rights to the power plant?	Westinghouse	14%
What supplies are transformers used in?	AC	0%
Other than laminas, what materials what materials can be used to prevent large eddy currents in transformers?	Ferrites	0%
In an equation, power loss, P(loss)=?	I^2R	0%
What type of transformer (not stepup or stepdown) is used in household appliances for recharging devices and rectifying currents from AC to DC.	Power-cube transformers	0%
What type of insulators prevent dry air sparks in high voltage transmission lines?	Suspension Insulators	0%
Where do transmission lines end and voltage is stepped down for distribution?	Terminal stations	0%
What is located in almost all regional centres for power distribution?	Zone substation	0%