A current of $4.82 \mathrm{~A}$ exists in a $12.4 \mathrm{\Omega}$ resistor for $4.60 \mathrm{~min}$. (a) How much charge and (b) how many electrons pass through any cross section of the resistor in this time?

In the given circuit, find the equivalent capacitance of the combination. Assume that $C_1=10.0 \mu \mathrm{F}, C_2=5.00 \mu \mathrm{F}$, and $C_3=$ $4.00 \mu \mathrm{F}$.

In the given circuit, find the equivalent capacitance of the combination. Assume that $C_1$ is $10.0 \mu \mathrm{F}, C_2$ is $5.00 \mu \mathrm{F}$, and $C_3$ is $4.00 \mu \mathrm{F}$.

The plates of a spherical capacitor have radii 37.0 mm and 40.0 mm. (a) Calculate the capacitance. (b) What must be the plate area of a parallel-plate capacitor with the same plate separation and capacitance?

The plates of a spherical capacitor have radii $38.0 \mathrm{~mm}$ and $40.0 \mathrm{~mm}$. Calculate the capacitance.

The plates of a spherical capacitor have radii 38.0 mm and 40.0 mm. Calculate the capacitance.

In the quark model of fundamental particles, a proton is composed of three quarks: two "up" quarks, each having charge +2e/3, and one "down" quark, having charge -e/3. Suppose that the three quarks are equidistant from one another. Take that separation distance to be $1.32 \times 10^{-15} \mathrm{~m}$ and calculate the electric potential energy of the system of

All three quarks.

The electronic flash attachment for a camera contains a capacitor for storing the energy used to produce the flash. In one such unit, the potential difference between the plates of an $850 - \mu F$ capacitor is 280 V.

Determine the energy that is used to produce the flash in this unit.

Assuming that the flash lasts for $3.9 \times 10 ^ { - 3 } \mathrm { s }$ find the effective power or "wattage" of the flash.

In the quark model of fundamental particles, a proton is composed of three quarks: two "up" quarks, each having charge $+2 e / 3$, and one "down" quark, having charge $-e / 3$. Suppose that the three quarks are equidistant from one another. Take that separation distance to be $1.32 \times 10^{-15} \mathrm{~m}$ and calculate the electric potential energy of the system of all three quarks.

In the quark model of fundamental particles, a proton is composed of three quarks: two “up” quarks, each having charge +2e/3, and one “down” quark, having charge -e/3. Suppose that the three quarks are equidistant from one another. Take that separation distance to be $1.32 × 10^-15 m$ and calculate the electric potential energy of the system of

all three quarks.

Humid air breaks down (its molecules become ionized) in an electric field of $3.0 \times 10^6$ N/C. In that field, what is the magnitude of the electrostatic force on an electron?

Humid air breaks down (its molecules become ionized) in an electric field of $3.0 \times 10^6$ N/C. In that field, what is the magnitude of the electrostatic force on an ion with a single electron missing?

Find the electric field at the center of the square of Fig. 26-26. Assume that $q=11.8 \mathrm{nC}$ and $a=5.20 \mathrm{~cm}$.

Calculate the magnitude of the electric field. due to an electric dipole of dipole moment $3.56 \times 10^{-20} \mathrm{C} \cdot \mathrm{m}$, at a point $25.4 \mathrm{~nm}$ away along the bisector axis.