1. (a) Why do large induction

1. (a) Why do large induction motors sometimes cause a dip in the supply system voltage when they are switched direct on line?

2. (b) Why, for a given induction motor, might it be possible to employ direct-on-line starting in one application, but be necessary to employ a starter in another application?

3. (c) What is meant by the term‘stiff’ in relation to an industrial electrical supply?

4. (d) Why would a given motor take longer to run up to speed when started froma weak supply, as compared with the time it would take to run up to speed on a stiff supply?

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