The frequency of induced voltage in a wire coil depends on
A) the frequency of current producing it.
B) how frequently a magnet dips in and out of the coil.
C) the number of loops in the coil.
Answer: B
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The above picture shows the Sun’s change in temperature with elevation into the Sun’s atmospheric layers. The region from 10,000-70,000 K is known as the ____________
a. photosphere
b. chromosphere
c. corona
d. transition zone
Which of the following wavelengths could NOT be present as a harmonic on a 2 m long string?
a. 4 m b. 2 m c. 1 m d. 0.89 m e. 0.5 m
What will you see with the following type of optic: Plano lens
A. Image is smaller |
B. Image is the same |
C. Image is larger |
What is the surface of Mercury like?
A. rocky, with volcanoes and old ocean basins B. gaseous C. rocky, with craters and scarps D. mostly rock, but covered about 40% by liquid methane