You are designing a generator to have a maximum emf of 8.0 V. If the generator coil has 200 turns and a cross-sectional area of 0.030 m2, what should be the frequency of the generator in a uniform magnetic field of 0.030 T?
A) 7.1 Hz
B) 7.5 Hz
C) 8.0 Hz
D) 22 Hz
E) 44 Hz
Answer: A
You might also like to view...
RC Circuits: A resistor, an uncharged capacitor, a dc voltage source, and an open switch are all connected in series. The switch is closed at time t = 0 s. Which one of the following is a correct statement about this circuit?
A. The charge on the capacitor after four time constants is about 98% of the maximum value. B. The charge on the capacitor after one time constant is 50% of its maximum value. C. The charge on the capacitor after one time constant is 1/e of its maximum value. D. The voltage on the capacitor after one time constant is 1/e of the maximum value. E. The voltage on this capacitor after one time constant is 100% of its maximum value.
A car heading north collides at an intersection with a truck of the same mass as the car heading east. If they lock together and travel at 28 m/s at 46° north of east just after the collision, how fast was the car initially traveling?
Assume that any other unbalanced forces are negligible. A) 40 m/s B) 20 m/s C) 80 m/s D) 30 m/s
At a location that is 3.00 m from wave source A and 4.20 m from wave source B, constructive interference occurs. Source A and source B are coherent and in phase
What is the maximum wavelength of the waves? A) 2.40 m B) 12.6 m C) 0.60 m D) 1.20 m E) There is no maximum wavelength.
The ultimate source of energy that powers the Sun is
A) chemical potential energy of hydrogen burning into helium. B) mass energy of hydrogen fusing into helium. C) gravitational potential energy of the contraction of the gas cloud that formed the Sun. D) kinetic energy of the orbital motion of the Sun. E) thermal energy of the hydrogen atoms in the Sun.