A step-up transformer has an input voltage of 110 V (rms). There are 100 turns on the primary and 1500 on the secondary. What is the output voltage?
a. 1600 V (max)
b. 1650 V (rms)
c. 3260 V (max)
d. 165 kV (rms)
e. 7.3 V (rms)
b
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Fill in the blank(s) with the appropriate word(s).
If the rotating coil used in a generator has its radius doubled, what change results in the amplitude of the voltage produced?
a. It doubles. c. It is increased by a factor 23/2. b. It quadruples. d. It stays the same.
Study this H-R diagram. What is the spectral type of the star Sirius? (The red arrow helps you locate Sirius on the diagram.)
A) A B) 102 C) main sequence D) blue
Calculate the current through a 10.0-m long 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. (The resistivity of nichrome is 100 × 10-8 ??m.)
A) 17.5 A B) 30.9 A C) 61.8 A D) 0.388 A E) 0.776 A