The principle of operation that transformers depend upon is the induction of current in the secondary windings due to:

A. motion of the primary winding relative to the secondary
B. a varying magnetic field
C. interaction of the core with the windings
D. a varying electric field


B. a varying magnetic field

Physics & Space Science

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The terrestrial celestial object _________________ is most like Mercury

Fill in the blank(s) with correct word

Physics & Space Science

What is ?min for a monochromatic beam of light of wavelength 600 nm and an aperture diameter of 6.00 mm?

A) 100 × 10-6 rad B) 202 × 10-6 rad C) 122 × 10-6 rad D) 244 × 10-6 rad E) 236 × 10-6 rad

Physics & Space Science

In the above model of an atom, if you were to draw an electron’s transition from the second excited state to the third excited state, what numbers would this correspond from/to? What kind of spectrum would be produced?



a. 3 to 4, absorption
b. 2 to 3, absorption
c. 3 to 4, emission
d. 2 to 3, emission

Physics & Space Science

The two great theories of 20th-century physics are quantum theory and

A) the theory of relativity. B) thermodynamics. C) Hamiltonian mechanics. D) the bootstrap theory of elementary particles. E) electromagnetism.

Physics & Space Science