Question

A wire of resistance 20 ohm is bent to form a square. What is the resistance across its side

Answer 1

Answer:

5 ohm

Explanation:

According to the given question,

Total resistance = 20 ohm

And we are asked to find the resistance across the side of a square, made of a wire.

We know,

There are four sides of a square each of equal length. Therefore, distribution of resistance will also be uniform and resistance of each side will be equal.

Thus resistance of each side will be,

• R = 20/4 = 5 ohm

Let resistance of four sides be R1, R2, R3 and R4 respectively.

Where, R1 = R2 = R3 = R4 = R = 5 ohm

Answer 2

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If a wire of resistance 20 ohm is bent in square it means all the resistance of wire will be in series .

Then,

The number of side of square = 4

So,

Each Resistance = 20/4

Resistance of each side = 5 ohm

It means Resistance of all the sides will be 5 ohm each and effective resistance will be 20 ohm.