Multiple Choice
Field due to a long wire: The figure shows two long wires carrying equal currents I1 and I2 flowing in opposite directions. Which of the arrows labeled A through D correctly represents the direction of the magnetic field due to the wires at a point located at an equal distance d from each wire?
A) A
B) B
C) C
D) D
E) The magnetic field is zero at that point.
Correct Answer:

Verified
Correct Answer:
Verified
Q39: Force on moving charges: A particle with
Q40: Ampere's law: A very long, hollow, thin-walled
Q41: Mass spectrometer: In a mass spectrometer, a
Q42: Toroids: A 1000-turn toroidal solenoid has a
Q43: Field of a long wire: Three very
Q45: Field of a long wire: Two long
Q46: Velocity selector: A proton, with mass 1.67
Q47: Force on parallel wires: The figure shows
Q48: Velocity selector: A beam of electrons is
Q49: Force on currents: A wire carries a