An ac generator consists of a coil with 40 turns of wire, each with an area of 0.06 m2. The coil rotates in a uniform magnetic field B = 0.4 T at a constant frequency of 55Hz. What is the maximum induced emf?
A) 110 V
B) 625 V
C) 200 V
D) 421 V
E) 332 V
Question 2A resistor is connected to normal 60. Hz, 120. volt AC. How many times a second does the instantaneous dissipated POWER reach a maximum?
A) 240
B) 0
C) 60
D) 30
E) 120
Question 3An electron is moving with speed 21. m/s.
(a) What is its deBroglie wavelength?
(b) What Diffraction Grating spacing between slits would give a 1st order maximum at 30.0?
Question 4If you were to come back to Earth in 150 million year's time, what would a map of the planet look like compared to today?
A) so completely different that none of our current continents would be recognizable
B) only slightly different because plate motion is extremely slow
C) exactly the same because plate tectonics is no longer occurring
D) quite different because plate tectonics would have caused a shift in the position of the continents
Question 5A glass plate 2.5 cm long is separated from another glass plate by a strand of someone's hair (diameter 0.010 mm). How far apart are the adjacent interference bands when viewed with light of wavelength 600 nm?
What will be an ideal response?
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