Hi Mary, Ham salad doesn't freeze well as mayonnase separates causing an unappetizing mixture. It's not harmful...just not very appetizing when thawed. You don't find mayonnaise-based salads frozen
TV might, depending on the manufacture, but most likely can. Fridge, no, that is not possible, it is a linear device, and depends on the exact voltage that is required. The oven as well, and so is the
Hello Prashant ... this is a bit out of my expertise, but I do know for example, that computer power supplies for desktops and towers have a selectable power input for 110 or 220 VAC. It's just a slide-switch
Most switch mode power supplies that are designed today can do this. So the answer to this question is yes.
Squeeze the two tabs on either side of the plug together and pull. Check the date on the back of the detector (to make sure it's not over ten years old). If it is, then you'll need to buy a new detector