Advertisements
Advertisements
Question
What changes in energy occur in an electric heater?
Advertisements
Solution
In an electric heater, electrical energy changes to heat energy.
RELATED QUESTIONS
An electric motor takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.
Define watt-hour. How many joules are equal to 1 watt-hour?
What is the maximum power in kilowatts of the appliance that can be connected safely to a 13 A ; 230 V mains socket?
How much energy does a 100 W electric bulb transfer in 1 minute?
(a) 100 J
(b) 600 J
(c) 3600 J
(d) 6000 J
Name two gases which are filled in filament type electric light bulbs.
Calculate the resistance of an electric bulb which allows a 10 A current when connected to a 220 V power source.
Of the three connecting wires in a household circuit: Which two of the three wires are at the same potential? In which of the three wires should the switch be connected?
1 kWh is equal to:
Compare the power used in the 2 Ω resistor in each of the following circuits:
- a 6 V battery in series with 1 Ω and 2 Ω resistors
- a 4 V battery in parallel with 12 Ω and 2 Ω resistors.
