A 70 Coulomb charge is flowing to a copper wire whose length is 2500 m and has a cross sectional area of 3.14 mm and resistivity of 1.68 * 10 ^ - 8 ohmmeter, in 5 minutes. What is the emf needed to make the seventy Coulomb charge flow? Compute the cost per hour at 7.50 pesos per kwh of electrifying the house. If the appliances inside the house are an electric fan with resistance of 25 ohms, television which requires 5 ampere of current to start, water dispenser with resistance of 3 ohms, all connected to 220V and on for 8 hrs. If a 60 W electric heater has a current of 4 A at 20C, how much resistance will be increase if the temperature rose to 45C and temperature coefficient is 0.000426 per degree Celsius