Why do electricity supply companies include fixed charges in their accounts for electricity?

1.Why do electricity supply companies include fixed charges in their accounts for

 

electricity? 2.What is an ‘off-peak tariff’? Explain the structure of the Economy 7 and Economy

10 tariffs, and describe the pattern of demand from a domestic consumer who could be expected to opt for such tariffs. 3.Why may an electricity supply company or a consumer decide that a coin or token prepayment meter should be used in a particular installation?

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Sketch the load characteristics, terminal voltage/load current, of the following types of DC generator

1. (a) Sketch the load characteristics, terminal voltage/load current, of the following types of DC generator: (i) series-connected, (ii) shunt-connected and (iii) compound-connected.   (b) State one purpose for which….

what happens if the resistance in series with the shunt field of a DC motor is increased in value

1. Sparking at the trailing edges of the brushes in a DC machine is usually prevented by fitting   (a) copper gauze brushes (b) a compensating winding (c) a compound….

Calculate the synchronous speed of a 10-pole three-phase machine connected to a 50 Hz supply.

1. The generator characteristic shown in Figure 9.28 is for a   (a) shunt machine (b) series machine (c) differentially compounded machine (d) cumulatively compounded machine 2.The speed of a….