Question

3.
Separate out the devices, listed below, into categories that usually work with
(i) either batteries or mains (ii) batteries only (iii) mains only.
kettle, iron press, calculator, toaster, mobile phone, washing machine, radio,
transistor, computer, microwave oven.​

Answer 1

Explanation:

either batteries or mains: radio, computer (ii) only batteries: mobile phone, calculator, transistor (iii) only mains: electric kettle, iron press, toaster, washing machine, microwave oven