The correct answer is: C. 50 to 60%
The load factor of domestic load is the ratio of the average power to the peak power. It is usually between 50 and 60%, which means that the average power is 50 to 60% of the peak power. This is because domestic loads are typically intermittent, meaning that they are not used all the time. For example, a light bulb is only used when it is turned on, and a refrigerator is only used when it is running. This means that the average power of a domestic load is much lower than the peak power.
Option A is incorrect because the load factor of domestic load is usually not between 10 and 15%. This is because domestic loads are typically intermittent, meaning that they are not used all the time. For example, a light bulb is only used when it is turned on, and a refrigerator is only used when it is running. This means that the average power of a domestic load is much lower than the peak power.
Option B is incorrect because the load factor of domestic load is usually not between 30 and 40%. This is because domestic loads are typically intermittent, meaning that they are not used all the time. For example, a light bulb is only used when it is turned on, and a refrigerator is only used when it is running. This means that the average power of a domestic load is much lower than the peak power.
Option D is incorrect because the load factor of domestic load is usually not between 60 and 70%. This is because domestic loads are typically intermittent, meaning that they are not used all the time. For example, a light bulb is only used when it is turned on, and a refrigerator is only used when it is running. This means that the average power of a domestic load is much lower than the peak power.