BIO Electric Field of Axons. A nerve signal is transmitted through a neuron when an excess of Na + ions suddenly enters the axon, a long cylindrical part of the neuron. Axons are approximately 10.0 μ m in diameter, and measurements show that about 5.6 × 10 11 Na + ions per meter (each of charge + e ) enter during this process. Although the axon is a long cylinder, the charge does not all enter everywhere at the same time. A plausible model would be a series of point charges moving along the axon. Consider a 0.10-mm length of the axon and model it as a point charge. (a) If the charge that enters each meter of the axon gets distributed uniformly along it, how many coulombs of charge enter a 0.10-mm length of the axon? (b) What electric field (magnitude and direction) does the sudden influx of charge produce at the surface of the body if the axon is 5.00 cm below the skin? (c) Certain sharks can respond to electric fields as weak as 1.0 μ N/C. How far from this segment of axon could a shark be and still detect its electric field?
BIO Electric Field of Axons. A nerve signal is transmitted through a neuron when an excess of Na + ions suddenly enters the axon, a long cylindrical part of the neuron. Axons are approximately 10.0 μ m in diameter, and measurements show that about 5.6 × 10 11 Na + ions per meter (each of charge + e ) enter during this process. Although the axon is a long cylinder, the charge does not all enter everywhere at the same time. A plausible model would be a series of point charges moving along the axon. Consider a 0.10-mm length of the axon and model it as a point charge. (a) If the charge that enters each meter of the axon gets distributed uniformly along it, how many coulombs of charge enter a 0.10-mm length of the axon? (b) What electric field (magnitude and direction) does the sudden influx of charge produce at the surface of the body if the axon is 5.00 cm below the skin? (c) Certain sharks can respond to electric fields as weak as 1.0 μ N/C. How far from this segment of axon could a shark be and still detect its electric field?
BIO Electric Field of Axons. A nerve signal is transmitted through a neuron when an excess of Na+ ions suddenly enters the axon, a long cylindrical part of the neuron. Axons are approximately 10.0 μm in diameter, and measurements show that about 5.6 × 1011 Na+ ions per meter (each of charge +e) enter during this process. Although the axon is a long cylinder, the charge does not all enter everywhere at the same time. A plausible model would be a series of point charges moving along the axon. Consider a 0.10-mm length of the axon and model it as a point charge. (a) If the charge that enters each meter of the axon gets distributed uniformly along it, how many coulombs of charge enter a 0.10-mm length of the axon? (b) What electric field (magnitude and direction) does the sudden influx of charge produce at the surface of the body if the axon is 5.00 cm below the skin? (c) Certain sharks can respond to electric fields as weak as 1.0 μN/C. How far from this segment of axon could a shark be and still detect its electric field?
An electron with speed v0 = 3388829.6m/s travels parallel to and along the same direction as an electric field of magnitude E = 3154N/C.
(a) How far will the electron travel before it stops? Answer in SI units and multiply your answer by 10^2.
(b) How much time will elapse before it returns to its starting point? Answer in SI units and multiply your answer by 10^8.
What is the magnitude of the strength of the electric field between two parallel conducting plates with a separation distance of 2.00 cm and having a voltage of 10 000 V?
a.20 000 N/C
b. 200 N/C
c.20 N/C
d. 2 000 N/C
A very long, straight wire has charge per unit length 2.60×10−10 C/m .
At what distance from the wire is the electric field magnitude equal to 2.90 N/C?
Express your answer with the appropriate units.
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