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Physics

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 3 Quiz: Analog Measuring Instruments – Galvanometer, Ammeter, Voltmeter and Ohmmeter

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1.
The primary function of Helium gas in the Helium-Neon laser tube is to:
B) Excite Neon atoms to their metastable state via resonant collision
A) Directly emit the red laser beam at 632.8 nm
D) Act as a partially reflecting output mirror
C) Cool the quartz tube by rapid convection
2.
In stimulated emission, the emitted photon and the triggering incident photon are characterized by having:
C) A random phase difference of $pi/2$
D) Independent speeds in vacuum
B) The exact same phase, frequency, direction, and polarization
A) Different wavelengths and perpendicular directions
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