Question

A wire of resistance 40 ohm is bent in the form of a closed circle. The effective resistance between two points at the ends of any diameter of the circle will be

Answer 1

Answer:

See the above Explanation.

Thanks.

Answer 2

Explanation:

The ans is 10ohm

If resistor is circle is bent to a circle then

There will be two paths for the current to flow through :

• Upper half of circular resistor having 20ohm
• Lower half the circular resistor having 20ohm

Since both the upper and lower parts of resistor will be in parallel

1/Re=1/20ohm+1/20ohm

1/Re=2/20ohm

Re=10ohm

Hence resistence between two ends of the diameter of the circular resistor will be 10ohm

Hope it helps

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