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The output voltage can be varied by a variac transformer over a | |
A. | very small range. [Wrong Answer] |
B. | wide range of 0 and 120 per cent of input voltage. [Correct Answer] |
C. | over a range of 0 and 50 per cent. [Wrong Answer] |
D. | over a range of 50 and 100 per cent. [Wrong Answer] |