A current of 4 A flows through a coil when connected to 12 volt DC source and a current of 2.4 A flows when the coil is connected to a 12V- 8 Hz AC source. (A) The ohmic resistance of the coil is?
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which of the following is correct?
i) cube of a negative number is always positive
ii) cube of a negative number is always negative
iii) cube of a negative number may be positive or negative
iv) all of the above
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