An electric kettle connected to the 230V mains supply draws a current of 10 A. Calculate:
(a) the power of the kettle.
(b) the energy transferred in 1 minute.

An electric bulb is connected to a 220V power supply line. If the bulb draws a current of 0.5A, calculate the power of the bulb.

A small heating element connected to 10 V dc supply draws a current of 5 A . Find the electric power supplied to the heater .

An electric heater is connected to the 230V mains supply. A current of 8A flows through the heater. (a) How much charge flows around the circuit each second? (b) How much energy is transferred to the heater each second?

A small heating element, connected to 10V d.c. supply draws a current of 5 A. How much electric energy is supplied to heater?

A 50 Omega electric iron is connected to an ac supply of 200V, 50 Hz. Calculate (i) average power delivered to iron (ii) peak power and (iii) energy spent in one minute.

A 50 Omega electric iron is connected to an ac supply of 200V, 50 Hz. Calculate (i) average power delivered to iron (ii) peak power and (iii) energy spent in one minute.

An electric heater takes 6A current from a 230V supply line, calculate the power of the heater and electric energy consumed by it in 5 hours.

The heating element connected to 230V draws a current of 5A. Determine the amount of heat dissipated in 1 hour (J = 4.2 J/cal).

The table below shows the current in three different electrical appliances when connected to the 240V mains supply: {:("Appliance","Current"),("Kettle",8.5A),("Lamp",0.4A),("Toaster",4.8A):} (a) Which appliance has the greatest electrical resistance? How does the data show this? (b) The lamp is connected to the mains supply by using a thin, twin-cored cable consisting of live and neutral wires. State two reasons why this cable should not be used for connecting the kettle to the mains supply. (c) Calculate the power rating of the kettle when if is operated from teh 240V mains supply. (d) A man takes the kettle abroad where the mains supply is 120V. What is the current in the kettle when it is operated from the 120 supply?