A Coil of Radius R = 5 Cm Lies Inside $\theta$

question 49

Multiple Choice

A coil of radius R = 5 cm lies inside a long solenoid which carries a current I₁ = 10 A and has 800 turns/m. The coil carries a current I₂ = 4 A and the normal of the plane of the coil is at an angle $\theta$ = 30º with the axis of the solenoid. The magnetic field produced by the solenoid at the center is ____ times greater than the magnetic field by the coil at the center.

• A) 100
• B) 200
• C) 1000
• D) 2000
• E) 8000

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Definitions:

Protonephridia

A network of dead-end tubules lacking internal openings in certain invertebrates, serving as an excretory and osmoregulatory system.

Nephridia

Excretory organs in many invertebrates, responsible for the removal of waste products from an organism's body.

Lancelets

Small, fish-like marine animals belonging to the subphylum Cephalochordata, known for their role as a model organism in evolutionary biology.

Nephridiopores

External openings of the nephridia, which are excretory organs in many invertebrates, allowing waste to exit the body.