On an iron box is marked as 690 W, 230 V.
Calculate the heat produced when the iron box works for 5 minutes.

On an iron box is marked as 690 W, 230 V. What do these markings mean ?

On an iron box is marked as 690 W, 230 V. What is the current flowing through the coil ?

Power of an electric heater working in 230 V is 1000W. Calculate the heat produced if the current passes for 5 minutes through the circuit .

An electric heater working at 230 V produces 1000 J energy in one second. Calculate the heat generated by it when it works for 5 minute.

If the resistance of two soldering irons working in 250 V are 500 Omega and 750 Omega . Calculate the heat produced in 5 minutes in the soldering iron having resistance 750 Omega .

An electric iron has the markings 880 W and 220 V. Calculate the resistance of the coil inside the iron

0.5 A current flows through an electric heating device connected to 230 V supply . Calculate the quantity of heat generated when current flows in the circuit for 5 minute.

In a household there are 4 CFL's of 15W each working for 5hrs a day, 2 fans of 60W working for 5hrs daily , 500Wiron box working for 15 minutes a day. How many units of electricity is used in this house . What is the cost of electricity costing 3 rupees per unit ?

A stepdown transformer used in the line AC of 220 V to light up a bulb marked 12V, 30 W:-Suggest a method to modify the core so that the heat produced In the core can be minimised.