# Homework Help: Don't understand with what the question want

1. Dec 22, 2004

### Sanosuke Sagara

A long piece wire of mass 0.1kg and length 4.0m is used to make a square coil 0.1m on a side.The coil is hinged along a horizontal side,carries a 3.4 A current,and is placed in a vertical magnetic field of mahitude 0.01 T.

(a)Determine the angle that the plane of the coil makes with the vertical when the coil is in equilibrium.

I want to know what is meant by the 'square coil 0.1m on a side' phrase ?Is it mean each length of the coil is 0.1m ? or only one length is 0.1m and the other end is 3.9m making the dimension of the coil is (3.9 x 0.1) ?

Thanks for anybody that spend sometime on this question .

2. Dec 22, 2004

### Andrew Mason

Something is wrong in the question. Either it is .4 m long and a square .1 m x .1 m. or it is 4 m. long and a square 1 m x 1 m.

AM

3. Dec 22, 2004

### Sanosuke Sagara

Ok ,anyway thanks for your help in this question.Thanks.

4. Dec 22, 2004

### Gamma

I think there is no mistake in the problem. The square coil has 10 turns.

Each coil length = 4 X 0.1 = 0.4 m
If the coil has 10 turns, total length = 10 X 0.4 = 4 m

Gamma

5. Dec 22, 2004

### Sanosuke Sagara

Your assumption is right Gamma and I can calculate the angle made between the plane of the coil and magnetic field.