In the picture below, the two wires carry current i1 and i2, respectively, with

Question

In the picture below, the two wires carry current i1 and i2, respectively, with positive current to the right. The charge q is positive and has velocity v to the right.

True or False:

1) If i1 = 0 and i2 is greater than zero, then the magnetic field near charge q points into the page.

2) If i1 = 0 and i2 is greater than zero then the force on q is south.

3) If v = 0, then the force on q is zero.

4) If i2 = - i1 then the force on q equals zero.

5) If i1 = i2, then the wires are attracted to each other.

6) If i1 = 0 and i2 is greater than zero, then the force on q points out of the page.

7)If i1 is less than i2, then the force on q is south..

Explanation / Answer

1) according to the right hand thumb rule. The mag field will be out of the page. Hence FALSE.

2) Right hand rule gives the force on the charge will be south. Hence True.

3. Force is the product of velocity v, charge Q, and mag filed B. Since v=0, force is zero. Hence True.

4. True because of the right hand rule.

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