Question

What is immaterial for an electric fuse wire?

Answer 1

Answer:its length

Explanation:

Answer 2

Hey Dear,

# Let's add required options first -

A) length

B) radius

C) current

D) specific resistance

◆ Answer -

(A) Length

● Explaination -

Let ∆T be maximum increase in temperature fuse wire can sustain without melting.

Heat produced by electric fuse wire is given by -

H = I²Rt

m.c.∆T = I².(ρl/A).t

lAd.c.∆T = I².(ρl/A).t

∆T = (I².ρ.t) / (A².c.d)

From this we can say that, durability of fuse wire depends upon -

• current flowing through wire
• specific resistance
• tine used
• cross-sectional area
• specific heat capacity
• density of wire material

Hope I was useful...