Electrical Energy and Power

Electrical Energy and Power problem 12

Determine whether the following statements are correct:

  • Electrical work depends on the flow of electric charge and voltage.

  • The basic unit for electrical work is the kilowatt hour.

  • With electrical work, there can be change in the energy of a body.

  • Energy conversion in electricity is always accompanied by heat.

  • In electric motors, all electrical work is converted into mechanical work.

  • When electric current flows through a resistor, all the electrical work done on the resistor is converted into heat. So, it heats up.

  • In filament lamps, most of the electrical part is converted to light.


material editor: Habeeb Adenle