MIDTERM 3 SECTION NAME 8. All electromagnetic waves travel through a vacuum A. d

Question

MIDTERM 3 SECTION NAME 8. All electromagnetic waves travel through a vacuum A. depends on the inertial frame (observer) B. speeds that are proportional to their frequency C. speeds that are inversely proportional to their frequeney D. at the same speed D. None of the above. -9. Can a battery be used as the primary voltage source in a transformer? why or Why not? A. Yes, it can be connected in series with each winding B. Yes, it can be connected in parallel with each winding C. No, it needs higher emf than the battery can deliver D. No, battery delivers direct current E. Depends on the outcome 10. A magnet moves inside a coil. Consider the following factors: I. Strength of the magnet II. Number of turns in the coil III. Speed at which the magnet moves Which can affect the emf induced in the coil? A. I only B. II only C. III only D. I and II only

Explanation / Answer

8. In vacuum,

speed of EM wave, v = c

Ans(D)

9. No, transformers work on Alternating current only.

ANs(D)

10. all I, II and III

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