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A circuit breaker is rated as 1500 A, 1000 MVA, 33 kv, 3-second , 3- phase oil circuit breaker. The rated normal current is

1500/√3 A
750 A
1500 A
None of these

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The material used for fuse must have

Low melting point and low specific resistance
low melting point and high specific resistance
high melting point and low specific resistance
low melting point and any specific resistance

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