Answer & Solution
Answer: Option C
Solution:
The correct answer is
(C) Becomes double
Here's why:
Capacitance (C) of a cable is determined by the following factors:
* The
dielectric constant of the insulation material.
* The
area of the conductors.
* The
distance between the conductors (thickness of insulation).
* The
length of the cable.
Think of a cable like a parallel plate capacitor.
The formula for capacitance is roughly:
C = (ε * A) / d
Where:
ε is the
permittivity (related to the dielectric constant).
A is the
area of overlap of the conductors.
d is the
distance between the conductors.
When the
length of the cable is doubled, it's like increasing the
area of overlap (A) between the conductors.
Imagine connecting two identical capacitors in parallel.
The total capacitance doubles.
Therefore, if you
double the length of the cable, you effectively
double the capacitance.
