How do we find out that what range of fuse should be connected in a circuit of any current?

How do we find out that what range of fuse should be connected in a ci

1.	How do we find out that what range of fuse should be connected in a circuit of any current?
Answer» Current rating\xa0is the maximum\xa0current\xa0that a\xa0fuse\xa0will carry for an indefinite period without too much deterioration of the\xa0fuse\xa0element. A wide range of power switching transistors are also available, with\xa0current rating\xa0up to several hundred amperes and voltage\xa0ratings\xa0well over 1000V.\xa0To test a fuse without multimeter, take a flashlight equipped with a flat battery. Unscrew the bulb and get the battery. Place the\xa0fuse\xa0of one of the battery “blades” and the base of the bulb on the other side of the\xa0fuse. Put the bulb pad in contact with the second “blade” of the battery.