A technician has 10 resistors each of resistance . Find the largest and smallest resistance that he can obtain by combining these resistors.
Find in volts.
Bill has two identical lamps each of resistance 5 ohms and two 9-volt-batteries. If he wants to light the two lamps for a duration as long as possible, how should he connect the lamps and batteries?
When a charged capacitor is disconnected from its source it will eventually discharge. This is because a small amount of charge leaks through the dielectric between the plates of the capacitor. Suppose we fill a parallel plate capacitor with a ceramic of relative permittivity and resistivity . The capacitor is charged by connecting it to a voltage source. How long will it take in seconds for the capacitor to lose half of the charge acquired after disconnecting it from the source?
A 120V source is connected across the plates of a parallel-plate capacitor. The capacitor is being submerged vertically at constant speed into a container filled with water. What current in Amps flows through the voltage source during this process if it takes to totally submerge the capacitor? The capacitance (in air) of the capacitor is and water's relative permittivity is
Hint: If the capacitor is partially submerged at an instant of time try figuring out how to treat it as two separate capacitors at that instant.