## Abhisar one year ago Brain Teaser ;) Four wires each of length 2.0 m, are bent in four loops as shown below. All of them are suspended in uniform magnetic field separately. All four carries same current, which of the following statement is correct?

1. Abhisar

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2. Abhisar

$$\bf Statements$$ a) Torque acting on loop P is greatest. b) Torque acting on loop S is greatest. c) Torque acting on all is same. d) Torque on R is greatest. e) Torque on Q is greatest.

3. anonymous

do you know how to derive torque formula?

4. Abhisar

Yes, I do. I have posted this question just to share c:

5. IrishBoy123

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6. Abhisar

@irishboy123 all the loops are suspended in same magnetic field one by one.

7. Abhisar

You are not given with the magnitude or direction of field.

8. IrishBoy123

lol!! i geddit now :-). my maths kept crashing. damned fine question, sir

9. IrishBoy123

i an put a pretty generalish proof here when this is done....