JAMB - Physics (2005 - No. 27)
An electric device is rated 2000 W, 250 v. The correct fuse rating of the device is?
9 A
8 A
6 A
7 A
คำอธิบาย
For the device rated 2000 W, 250 V, implies that current I, flowing is given by the relation
Power = IV
I = (power)/v = (200)/250
= 8A.
∴ the most suitable fuse for the device is 8A
Power = IV
I = (power)/v = (200)/250
= 8A.
∴ the most suitable fuse for the device is 8A