Question

If the diameter of wirwe is half, then its resistnce becomes
a)half
b)twice
c)fourth
d)one/half
plz help me guys​

Answer 1

Answer:

Forth...

Because the thickness of a wire is usually represented by its diameter. Thus when the diameter of a wire is doubled (made 2 times), its resistance becomes one-fourth (1/4), and if the diameter of a wire is halved (made 1/2), then its resistance becomes four times (4 times).

Answer 2

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•As we know that Resistance is inversely propotional to the square of its diameter.

So now,

When the diameter is halved the resistance of the wire becomes Four times.

Therefore,Option C is correct.

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