10. Shown below are several situations with two wires with currents of 2Aflowing

Question

10. Shown below are several situations with two wires with currents of 2Aflowingout o ( orinto(X) hepage You may assume that each wire or point of interest is separated by the same distance from the adjacent items. Which of the following statements are true about the situations at point P depicted in the figures below? (), ( OO , OO , (T/F) The direction of the magnetic field at point P in picture F is T/F) The magnetic field is zero at point P in picture E (T/F) The magnitude of the magnetic field at point P in picture A is greater than the one in picture E (T/F) A proton going into picture D from the top would experience no force at point P (T/F) A proton going into picture B from out of the page would be deflected left at point P

Explanation / Answer

1) T, right-hand thumb rule (thumb pointing in direction of the current , fingers curled in direction of magnetic field)

2) F, non zero, upwards (the distance of point P from wires is different, therefore differing strength, hence non zero magnetic field)

3)T , Magnetic fields adding up due to individual wires in case A

4) T, magnetic field B = 0 at point P, F = qVXB = 0

5) F, force to the right of the page (direction of the force is given by direction of V X B, B being upward and V being into the page)

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