A very small source of light that radiates uniformly in all directions produces an electric field amplitude of 8.19 V/m at a point 9.05 m from the source. What is the average power output from the source? (Use c = 2.9979 x 108 m/s)

Two parallel conducting plates each have an area of 500 cm^2 and are separated by 0.0060 m. If the plates are connected to the opposite terminals of a 12V battery, what will be the strength of the electric field in the region between the plates?

An accelerating voltage of 2.71 x 10³ V is applied to an electron gun, producing a beam of electrons originally traveling horizontally north in vacuum toward the center of a viewing screen 32.7 cm away. What is the magnitude of the deflection on the screen caused by the Earth's gravitational field? What is the direction of the deflection on the screen caused by the Earth's gravitational field? O up down O east west m What is the magnitude of the deflection on the screen caused by the vertical component of the Earth's magnetic field, taken as 20.0 μT down? mm What is the direction of the deflection on the screen caused by the vertical component of the Earth's magnetic field, taken as 20.0 μT down? O north O south O east O west Does an electron in this vertical magnetic field move as a projectile, with constant vector acceleration perpendicular to a constant northward component of velocity? O Yes O No Is it a good approximation to assume it has this projectile motion? O Yes No

Which of the below statement is true for an ideal capacitor? The electric field is uniform inside the capacitor and zero outside. The electric field is nonuniform inside the capacitor and almost zero outside. The fringe field of the capacitor contributes the most to the total field. The electric field points from the negative electrode to the positive electrode.