A metal blade (length = 80 cm) spins at a constant rate of 10 radians/s about a pivot at one end. A uniform magnetic field of 2.0 mT is directed at an angle of 30° with the plane of the rotation. What is the magnitude of the potential difference between the two ends of the blade?
a. 5.5 mV
b. 6.4 mV
c. 3.2 mV
d. 11 mV
e. 13 mV
C
You might also like to view...
_________ is absorbed by water in Earth's atmosphere and requires that telescopes for observing at these wavelengths be placed on mountain tops or in space
a. Infrared radiation b. Ultraviolet radiation c. Radio wave radiation d. X-ray radiation e. Visible light
Momentum: A rubber ball and a lump of clay have equal mass. They are thrown with equal speed against a wall. The ball bounces back with nearly the same speed with which it hit. The clay sticks to the wall. Which one of these objects experiences the greater momentum change?
A. the ball B. the clay C. Both of them experience the same non-zero momentum change. D. Both of them experience zero momentum change.
From Kepler's third law, a hypothetical planet that is twice as far from the Sun as Earth should have a period of
A) 1/2 Earth year. B) more than 2 Earth years. C) 1 Earth year. D) 2 Earth years. E) It depends on the planet's mass.
A bullet fired horizontally from a rifle begins to fall
A) as soon as it leaves the barrel. B) after air friction reduces its speed. C) neither of these