Discussion
Which one of the following statements is not correct?
Answer: A
The statement that is not correct is 'There is a minimum limit of current which can safely flow in the electric circuit.'
Every circuit has a maximum safe current. Above it the wires overheat and can cause a fire, which is why fuses are fitted in the electric circuits of all buildings: a fuse wire melts and breaks the circuit when the current exceeds the safe limit.
There is no minimum safe current: a smaller current is always safe, it simply does less work. So statements B, C and D are correct and A is the incorrect one.
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