Question

Question 11.. If a wire having resistivity p is cut in 4
pieces, the resistivity of each piece will be
if temperature has been kept constant​

Answer 1

Answer

Original resistance = r ohms

After cutting in 4 parts,

Resistance of each part = r/4 ohms

Net resistance when connected in parallel,

1/r' = 4/r + 4/r + 4/r + 4/r

1/r' = 16/r

r' = r/16 ohms

Therefore resistance becomes 1/16 times

Ratio = Resistance of combination: Original Resistance = r':r = r/16:r = 1:16