battery

Suppose a 6 volt battery, a 10 ohm resistor, a 15 uf capacitor, and a switch are hooked up in series while the switch is open. The switch is closed at the same instant that a stopwatch is started. Describe what happens both qualitatively and as quantitatively as you can.

Physics

Physics study material

Find the current

Find the current which flows through each of the four resistors in the figure.

Voltage difference

Imagine a space station module shaped like a cylinder 30 m long and 5 m diameter orbiting close to the earth above the earth's equator. What would be the maximum potential difference that could develop between the ends of the module? How would the module have to be oriented to get this maximum voltage difference? Could this voltage difference be used to supply the station with electric power? If so, how? If not, why not?

Voltage difference, flow

Imagine that we have two metal rails 20 cm apart connected by a light bulb. The rails are placed in a 1.0 T magnetic field oriented vertically downward. We then constrain a bar to slide on the rails toward the lightbulb in this magnetic field. How fast do we have to move the bar to put a voltage difference of 3.0 V across the bulb? In what direction does the current flow?