In the picture below, the two wires carry current i 1 and i 2 , respectively, wi

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.

1.True / False: If i1 is less than i2, then the force on q is south..

2.  True / False : If i1 = 0 and i2 is greater than zero, then the force on q points out of the page.

3.  True / False : If v = 0, then the force on q is zero.

4.  True / False : If i1 = - i2, then the wires repel each other.

5.  True / False : If i2 = - i1 then the force on q equals zero.

6. True / False : If i2 = 0 and i1 is greater than zero, then the force on q is north.

7.  True / False : If i1 = 0 and i2 is greater than zero, then the magnetic field near charge q points into the page.

ANSWERS ARE NOT :

TFTFTTF OR FFTFFTF

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.

1.True / False: If i1 is less than i2, then the force on q is south..

2.  True / False : If i1 = 0 and i2 is greater than zero, then the force on q points out of the page.

3.  True / False : If v = 0, then the force on q is zero.

4.  True / False : If i1 = - i2, then the wires repel each other.

5.  True / False : If i2 = - i1 then the force on q equals zero.

6. True / False : If i2 = 0 and i1 is greater than zero, then the force on q is north.

7.  True / False : If i1 = 0 and i2 is greater than zero, then the magnetic field near charge q points into the page.

ANSWERS ARE NOT :

TFTFTTF OR FFTFFTF

Explanation / Answer

TFTTFTF

First is true because F =qv x B, B will be out of the page. So F will point south

Second is false because in second case also Force will be southward as it is similar to first.

Third is true because F=qvB

Fourth is true because when current in first wire is opposite to second i.e. leftward, magnetic field at second wire is out of the page and Force will acts southward as we saw in first two statements.

Fifth statement is false because force is zero if i1 =i2

Sixth is true because it is just opposit to first statement, here B is into the page and F=qv x B . So F acts northward

Seventh is false because when i2 is positive and i1 =0, magnetic field points out of the page

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