which of the following devices works by converting electricity into heat?\na battery\nb resistor\nc…

Brief Explanations:

A battery converts chemical energy to electrical energy. A capacitor stores electrical energy in an electric - field. A transformer changes the voltage level of an alternating - current (AC) electrical power. A resistor dissipates electrical energy as heat when current passes through it due to the resistance it offers to the flow of current.

Answer:

B. resistor