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Short Note
A high tension (HT) supply of, say, 6 kV must have a very large internal resistance. Why?
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Solution
In order to prohibit the current from exceeding the safety limit, a high tension supply must have a very large internal resistance. If the internal resistance is not large, then the current drawn can exceed the safety limits in case of a short circuit.
Concept: Measurement of Internal Resistance of a Cell
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