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The correct answer is option 1. When water is heated with a coil of resistance connected to the domestic supply, the rise in temperature of the water depends on the supply voltage, the current passing through the coil, and the time for which the voltage is supplied.
Option 1 is correct because the supply voltage plays a significant role in heating the water. A higher supply voltage will deliver more power to the coil, resulting in a faster increase in temperature.
Option 2 is also correct because the current passing through the coil determines the amount of power dissipated as heat. A higher current will generate more heat and lead to a faster rise in temperature.
Option 3 is correct because the time for which the voltage is supplied affects the total amount of energy transferred to the water. The longer the voltage is supplied, the more heat will be transferred, resulting in a greater rise in temperature.
In conclusion, all three factors - supply voltage, current passing through the coil, and the time for which voltage is supplied - play a role in determining the rise in temperature of the water when heated with a resistance coil connected to the domestic supply.