The Figure Shows Four Different Sets of Insulated Wires That

question 21

Multiple Choice

The figure shows four different sets of insulated wires that cross each other at right angles without actually making electrical contact.The magnitude of the current is the same in all the wires,and the directions of current flow are as indicated.For which (if any) configuration will the magnetic field at the center of the square formed by the wires be equal to zero?

• A) A
• B) B
• C) C
• D) D
• E) The field is not equal to zero in any of these cases.

---

Definitions:

Constitutionality

The quality of being in accordance with a political constitution, especially with regard to its rights and freedoms.

Legislative Statutes

Laws that have been formally enacted by a legislative body, such as a parliament or congress.

Administrative Regulations

Rules and procedures established by governmental agencies to enforce laws and implement policy.

Electoral College

A body of electors established by the United States Constitution, formed every four years for the sole purpose of electing the president and vice president.