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2 cards from this section. Quick, good the night before a test.
What is the direction of the electric field around a positively charged wire?
Consider the effect a positive test charge would have.
If the linear charge density of a wire is doubled, what happens to the electric field strength at a given distance?
Look at the formula for electric field around a wire.
What does Gauss's Law relate to?
Think about the relationship between electric field and charge.
True or False: The electric field inside a charged spherical shell is non-zero.
Consider Gauss's law in relation to the shell.
Two infinite wires are placed parallel to each other, one positively charged and one negatively charged with the same linear charge density. Calculate the electric field at a point midway between them.
Consider the contributions from both the positive and negative charges.
Derive the electric field for a cylindrical wire with varying linear charge density and explain how that calculation differs from uniform charge density.
Think about how you would set up your Gaussian surface for this case.
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