Electrostatic Field Plotting

Wednesday, 29 August 2018

7:57 PM

Untitled picture.png Machine generated alternative text:
A particle with a charge 2.15 C is placed in a uniform electric field. It experiences a force of 7.95 N. Another charge, 0.000294 C, is
placed in the same electric field. What size force does it experience?
1.09e-3
(Note: to enter powers of 10 use "e" notation: 1.23 x 105
Correct.
experienced by the second particle.
= 1.23 e 5)
You need to use the force on the first particle (F = Eq) to calculate the size of the electric field and then use this to calculate the force

Untitled picture.png Machine generated alternative text:
A charge of 0.0000267 C is moved from point A to point B. B is at a higher potential than A. The voltage difference between A and B is
8.31 V. How much potential energy does the charge gain?
2.22+4
J

Untitled picture.png Machine generated alternative text:
249867 electrons are moved from A, at a voltage of 1.32 V to B at a voltage of 8.63 V. What is the magnitude of the work done on the
electrons.
2.93+13
J

Untitled picture.png Machine generated alternative text:
Find the magnitude of the electric field intensity at a distance 10.9 cm, from the axis of a long, straight conductor, which has a radius
2.30 cm, and a charge density of 4.53 C/m.
7.47e11
Correct. Well done.
You need to use the equation:
E = q/ (21TEorl)
WC

Untitled picture.png Machine generated alternative text:
To derive the equation you used to solve the first part of this question what law did you use?
Select one:
a. Ampere's law
b. Faraday's law
c. Newton's laws of motion
d. Gauss's law
Ink Drawings
Ink Drawings
Ink Drawings
Ink Drawings
Ink Drawings

Untitled picture.png Machine generated alternative text:
To derive the equation you used to solve the first part of this question what law did you use?
Select one:
a. Ampere's law
b. Faraday's law
c. Newton's laws of motion
d. Gauss's law

Untitled picture.png Machine generated alternative text:
What assumptions did you need to make when you used this equation?
Select one:
a. The conductor is infinitely long.
b. The charges are moving quickly through the conductor.
c. The electric field drops to zero at a distance of 100 x the radius of the conductor

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