LR Circuits: an Ideal Solenoid Is 18

question 57

Essay

LR circuits: An ideal solenoid is 18.5 cm long, has a circular cross-section 2.20 cm in diameter, and contains 545 equally spaced thin windings. This solenoid is connected in a series circuit with an open switch, a 15.0-Ω resistor, and a battery of internal resistance 5.00 Ω and open-circuit terminal voltage of 25.0 V. (μ₀ = 4π × 10^-7 T ∙ m/A)
(a) What is the maximum amount of energy that the solenoid will store after closing the switch?
(b) How long after closing the switch will it take for the stored energy in the solenoid to reach one-half of its maximum value?

---

Definitions:

Aloof

Displaying a lack of interest or a detached, distant demeanor; not friendly or forthcoming.

Fullest Development

Reaching the highest level of growth or potential in various aspects of an individual's life.

Self-actualization

A concept in humanistic psychology referring to the realization or fulfillment of one's talents and potentialities, considered as a drive or need present in everyone.

Tension Reduction

The process of alleviating or eliminating stress, conflict, or anxiety within an individual or group.