A transformer is to be designed to increase the 30 kV (rms) output of a generator to the transmission line voltage of 345 kV (rms). If the primary winding has 60 turns, how many turns must the secondary have?
a. 57
c. 690
b. 6900
d. 11
C
You might also like to view...
After a skydiver reaches terminal velocity,
a. the force of gravity no longer performs work on the skydiver. b. work performed by the force of gravity is converted into gravitational potential energy. c. gravitational potential energy is no longer available to the system of the skydiver plus the Earth. d. gravitational potential energy is converted into thermal energy. e. thermal energy is converted into gravitational potential energy.
Answer the following statement(s) true (T) or false (F)
1. In a specific non-dispersive medium, a sinusoidal wave’s angular frequency is proportional to its wavenumber 2. In a specific non-dispersive medium, a sinusoidal wave’s period is proportional to its wavelength
An alpha particle (mass = 6.68 × 10^-27 kg) is emitted from a radioactive nucleus with an energy of 6.22 MeV. How fast is the alpha particle moving in m/s? (1 MeV = 1.6 × 10^-13 J)
a. 3.70 × 10^6 m/s c. 1.55 × 10^7 m/s b. 1.73 × 10^7 m/s d. 1.85 × 10^6 m/s
Consider the star to which the arrow points. How is it currently generating energy?
A) by core hydrogen fusion B) by hydrogen shell burning around an inert helium core C) by gravitational contraction D) by core helium fusion combined with hydrogen shell burning E) by both hydrogen and helium shell burning around an inert carbon core