An Ideal Solenoid of Length $10 \mathrm {~cm}$ Consists of a Wire Wrapped Tightly Around a Wooden Core

question 15

Multiple Choice

An ideal solenoid of length $10 \mathrm {~cm}$ consists of a wire wrapped tightly around a wooden core. The magnetic field strength is $4.0 \mathrm {~T}$ inside the solenoid. If the solenoid is stretched to $25 \mathrm {~cm}$ by applying a force to it, what does the magnetic field become?

• A) \(20 \mathrm {~T}\)
• B) \(4.0 \mathrm {~T}\)
• C) \(10.0 \mathrm {~T}\)
• D) \(1.6 \mathrm {~T}\)

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