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Chapter 4 - Alternating Current AC Circuits

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Chapter 5 - Dual Nature of Wave and Particle

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Chapter 6 - Atomic Spectra and X-Rays

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Chapter 7 - Lasers and Principles

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Chapter 8 - Modern Electronics and Semiconductors

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Quiz

Lesson 1: Magnetic Field of a Straight Wire, Circular Coil and Solenoid — Picture questions (exam style)

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1.
a solenoid is compressed to 1/4 of its length (same turns and current), with the same current (figure). What is the ratio of the new to the original flux density at the centre (or inside)?
a solenoid is compressed to 1/4 of its length (same turns and current), with the same current (figure). What is the ratio of the new to the original flux density at the centre (or inside)?
B₂ : B₁ = 1 : 16
B₂ : B₁ = 4 : 1
B₂ : B₁ = 1 : 4
B₂ : B₁ = 4 : 2