Question

In normal use, a current of 3.5 A flows through a hair dryer. Choose a suitable fuse from the following:

Options

• 3 A

• 5 A

• 10 A

• 30 A

Answer 1

5 A

Explanation:

The fuse rating must always be slightly higher than the devices normal operating current so it does not blow during regular use. Since the hair dryer draws 3.5 A, a 3 A fuse would melt immediately, making 5 A the closest and safest.