Field of a Circular Loop: a Long Straight Wire on the Z-Axis

question 57

Multiple Choice

Field of a circular loop: A long straight wire on the z-axis carries a current of 6.0 A in the positive direction. A circular loop in the xy-plane, of radius 10 cm, carries a 1.0-A current, as shown in the figure. Point P, at the center of the loop, is 25 cm from the z-axis. An electron is projected from P with a velocity of 1.0 × 10⁶ m/s in the negative x-direction. What is the y component of the force on the electron? (e = 1.60 × 10^-19 C, μ₀ = 4π × 10^-7 T ∙ m/A)

• A) -1.0 × 10^-18 N
• B) +1.0 × 10^-18 N
• C) -2.0 × 10^-18 N
• D) +2.0 × 10^-18 N
• E) zero

---

Definitions:

Tax

A monetary contribution to state revenue, levied by the government on workers' income and business profits or added to the cost of some goods, services, and transactions.

Price

The amount of money expected, required, or given in payment for something, reflecting the value that consumers and producers assign to a good or service.

Buyers

Individuals or entities that acquire goods or services in exchange for money.

Tax

Compulsory financial charges or levies imposed by a government on individuals, corporations, or other entities to fund public expenditures, providing for goods and services.