Assertion: Fuse wire must have high resistance and low melting point.
Reason: Fuse is used for small current flow only.

Options

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is NOT the correct explanation of A
C. A is true but R is false
D. A is false and R is true

Answer

C

Explanation

Fuse wire should melt and disconnect the circuit from mains supply if the current increases beyond a rated value. For this reason, its resistance should be high for more heat generation and melting point should be low for fast melting. So assertion is correct.
Fuse wire is not for small current flow. Fuse wire may be of various current rating depending on the type of appliance being used and the capacity of the wiring. So, the reason is false.