At One Instant an Electron (Charge = -1

question 45

Multiple Choice

At one instant an electron (charge = -1.6 *10^-19C) is moving in the xy plane, the components of its velocity being v_x = 5 *10⁵ m/s and v_y = 3 *10⁵ m/s. A magnetic field of 0.8 T is in the positive x direction. At that instant the magnitude of the magnetic force on the electron is:

• A) 0
• B) 3.8 *10^-14 N
• C) 5.1 * 10^-14 N
• D) 6.4 * 10^-14 N
• E) 7.5*10^-14 N

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Definitions:

Tibial Tuberosity

A protuberance on the tibia bone in the lower leg that serves as an attachment site for the patellar ligament.

Calcaneus

The large bone in the heel of the foot, forming the foundation of the rear part of the foot.

Antagonistically

Referring to muscles that work in opposition to each other to create movement, such as the biceps and triceps during arm movements.

Flexor Digitorum Longus

A muscle in the lower leg that flexes the toes.