At time t=0 an electron at the origin is subjected to a force that briefly accel
ID: 1505544 • Letter: A
Question
At time t=0 an electron at the origin is subjected to a force that briefly accelerates it in the +z direction, with an acceleration of 4e+17 m/s2. Before trying to answer the following questions, draw a clear diagram.
Location D is at < -26, 0, 0 > m.
a. At what time is a radiative electric field first detected at location D?
________s
b. What is the direction of propagation of electromagnetic radiation that is detected at location D?
---Select---
+x
-x
+y
-y
+z
-z
zero magnitude
b. What is the direction of the radiative electric field observed at location D?
---Select---
+x
-x
+y
-y
+z
-z
zero magnitude
e. What is the direction of the radiative magnetic field observed at location D?
---Select---
+x
-x
+y
-y
+z
-z
zero magnitude
h.What is the direction of propagation of electromagnetic radiation that is detected at location H?
---Select---
+x
-x
+y
-y
+z
-z
zero magnitude
i. What is the direction of the radiative electric field observed at location H?
---Select---
+x
-x
+y
-y
+z
-z
zero magnitude
k.What is the direction of the radiative magnetic field observed at location H?
---Select---
+x
-x
+y
-y
+z
-z
zero magnitude
l. What is the magnitude of the radiative magnetic field observed at location H?
Explanation / Answer
(a) time = distance/ velocity of light
t= 26/(3x108)
t=8.67x10-8seconds
(b) - x direction.
(c) +z direction.
(d)Eradiative= K qa/rc2
Eradiative=(9x109)(1.6x10-19)(4x1017)/{(3x108)2 *26}
Erad=2.46x10-10V/m.
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