AC Generator: An ac generator consisting of a coil with N turns rotating at angular speed ? in an external magnetic field B produces a maximum emf ?0.If you now decrease the number of turns in the coil to N/2 and at the same time cause it to rotate twice as fast, what will be the new maximum emf if you do not change any of the other quantities?
A. 4?0
B. 2?0
C. ?0
D. ?0/2
E. ?0/4
Answer: C
Physics & Space Science
You might also like to view...
How many moons does earth have
A) none B) one C) two D) three E) four
Physics & Space Science
The concept of hydrostatic equilibrium is critical to understanding how the Sun has remained stable long enough for live to evolve here
Indicate whether the statement is true or false
Physics & Space Science
The fact that ?mT = 2.9 × 10-3 m-K is known as
A) Maxwell's law. B) Planck's law. C) Bohr's law. D) de Broglie's law. E) Wien's law.
Physics & Space Science
An electron in the hydrogen atom has a wavelength of 2.67 nm. To what state of the hydrogen atom does this electron belong?
A) n = 2 B) n = 5 C) n = 8 D) n = 11 E) n = 14
Physics & Space Science