Author Question: What is the total energy of an electron moving with a speed of 0.95c? A) 2.6 10-13 J B) ... (Read 7 times)

captainjonesify · **on:** Jul 29, 2018

What is the total energy of an electron moving with a speed of 0.95c?

A)

2.6 10-13 J
B)

8.2 10-14 J
C)

1.1 10-13 J
D)

1.2 10-14 J
E)

2.2 10-14 J

Question 2

A solid non-conducting sphere of radius R carries a charge Q distributed uniformly throughout its volume. At a radius r (r < R) from the center of the sphere the electric field has a value E.

If the same charge Q were distributed uniformly throughout a sphere of radius 2R the magnitude of the electric field at a radius r would be equal to A)

E/8.
B)

E/2.
C)

2E.
D)

8E.
E)

E.