Charge of uniform density (40 pC/m2) is distributed on a spherical surface (radius = 1.0 cm), and a second concentric spherical surface (radius = 3.0 cm) carries a uniform charge density of 60 pC/m2. What is the magnitude of the electric field at a point 4.0 cm from the center of the two surfaces?
A. 3.8 N/C
B. 4.1 N/C
C. 3.5 N/C
D. 3.2 N/C
E. 0.28 N/C
Answer: B
You might also like to view...
At any given moment on Earth, there are about ________ active thunderstorms.
a. 100 b. 200 c. 300 d. 400
Which of the following is a feature of our solar system that should be predicted by a successful theory of solar system formation?
A) the age of our solar system B) the fact that all the planets in our solar system orbit the Sun in the same direction C) the fact that there are exactly four terrestrial planets and exactly four jovian planets D) the fact that Earth has a 23-1/2° axis tilt E) the fact that Jupiter has the most known moons in the solar system
As the average surface temperature of the Earth rises, the Northern hemisphere of the Earth is warming more rapidly than the Southern hemisphere because
A) the Northern hemisphere contains more landmass which more readily absorbs solar radiation B) during summer in the Northern hemisphere, the Earth is closer to the Sun C) there is less ice in Arctic regions compared to the Antarctic regions so less radiation is reflected out into space D) there are more clouds in the Southern hemisphere to reflect solar radiation out into space
Almost all properties of other stars are described relative to our Sun
Indicate whether the statement is true or false