A. Cyclo-converters are used to convert (a) low frequency ac to high frequency ac (b) high frequency ac to low frequency ac (c) ac to dc (d) dc to ac B. Controlled rectifier is used to convert (a) ac to ac (b) ac to dc (c) dc to dc (d) dc to ac C. Inverters are used to convert (a) ac to ac (b) ac to dc (c) dc to dc (d) dc to ac D. Match the devices on the left hand with circuit symbols on the right-hand side. (a) A1, B2, 3, D4 (b) A2, B1,C4, D3 (c) A2, B1,C3, D4 (d) A1, B2,C4, D3
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