What are the disadvantages of heating effect of current?

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Heating effect of current can 1) melt the insulation of a wire which can result in electric shock and short circuits, 2) heat is also a form of energy and if a current line gives away unnecessary heat then this means the reduction in the strength of current/power and this is not a desirable scenario
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The following are the disadvantages 1. Heat loss in very high amount leading to energy waste. 2. Sometimes it damages the component of circuit. 3. To counter balance the system external cooling system may be required.
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Heating effect of current are follows:- (1) It can melt wires in electric circuit. (2) It can cause short circuit and electric shock. (3) It can damage our electrical instrument, burn coils within it.
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