Podcast
Questions and Answers
How do we calculate the electric field when charges are continuously distributed over a region of space?
How do we calculate the electric field when charges are continuously distributed over a region of space?
- By averaging the charges in the region
- By taking the charges as a whole
- By breaking up the region into small pieces and treating each piece as a point charge (correct)
- By ignoring the distribution and treating all charges as point charges
In what limit can the total electric field be written as an integral for continuously distributed charges?
In what limit can the total electric field be written as an integral for continuously distributed charges?
- When the pieces are infinitesimally small (correct)
- When the charges are uniform
- When the pieces are randomly distributed
- When the pieces are large enough to be visible
What is the charge density for linear charge distribution?
What is the charge density for linear charge distribution?
- $dq/dV$
- $dA/dq$
- $dq/ds$ (correct)
- $dq/dA$
How is surface charge distribution characterized?
How is surface charge distribution characterized?
For volume charge distribution, what does the symbol $\rho$ represent?
For volume charge distribution, what does the symbol $\rho$ represent?
When working out the electric field from a continuous charge distribution, what is considered in the calculation?
When working out the electric field from a continuous charge distribution, what is considered in the calculation?
What does the flux of a vector field measure?
What does the flux of a vector field measure?
Which component of the electric field is non-cancelling for a wire along the -axis?
Which component of the electric field is non-cancelling for a wire along the -axis?
What is the arc length that does not depend on z or ?
What is the arc length that does not depend on z or ?
What is the magnitude of the electric field for a small charge with a magnitude of $1.44$ at a distance $R$ in the z direction?
What is the magnitude of the electric field for a small charge with a magnitude of $1.44$ at a distance $R$ in the z direction?
What concept is used to determine the electric field at a distance from a wire?
What concept is used to determine the electric field at a distance from a wire?
What is the formula for calculating flux through a surface?
What is the formula for calculating flux through a surface?
