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Explain in brief the function of an electric fuse in a domestic circuit. An electric heater of current rating 3 kW; 220 V is to be operated in an electric circuit of rating 5 A. What is likely to happen when the heater is switched 'ON' ? Justify your answer with necessary calculation.
Study the following statements : (a) A fuse in a circuit prevents damage to the circuit due to overloading. (b) Total resistance in a circuit increases due to overloading. (c) During short circuiting the current in the circuit abruptly increases. (d) In order that each appliance has same current, they are connected in parallel to each other. The correct statements are
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