Energy in the Electric Field: At a distance d from a point charge Q, the energy density in its electric field is u. If we now go to a distance d/2 from the charge, what is the energy density at the new location?

A. 16u
B. 8u
C. 4u
D. 2u
E. u


Answer: A

Physics & Space Science

You might also like to view...

As one of the strongest sources of radio waves in the solar system, the ________ has an observed period of about a day

Fill in the blank(s) with correct word

Physics & Space Science

What do we mean by the diffraction limit of a telescope?

A) It is the maximum size to which any telescope can be built. B) It describes the farthest distance to which the telescope can see. C) It describes the maximum exposure time for images captured with the telescope. D) It is the best angular resolution the telescope could achieve with perfect optical quality and in the absence of atmospheric distortion.

Physics & Space Science

A ball of mass mB is released from rest and acquires velocity of magnitude vB before hitting the ground. The ratio of the impulse delivered to the Earth to the impulse delivered to the ball is

A.

0.

B.
.

C.
.

D.
1

E.
.

Physics & Space Science

A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity after 3.0 s, assuming no air?

A) 9.8 m/s upward B) 9.8 m/s downward C) 0 m/s D) 19.6 m/s downward

Physics & Space Science