This PhysCast is going to use Ohm's Law and the idea of electrical power to examine a lightbulb used with two different supply voltages.

This PhysCast is will use Ohm's Law to look at the properties of a small electric motor.

This PhysCast is going to look at the resistivity of a piece of material and how to calculate the resistance of a particular arrangement.

A uniformly charged insulating sphere of radius a and net charge -2Q is placed inside the cavity of a conducting shell of an inner radius b and other radius c. If the shell has a net charge of 3Q and is concentric to the sphere, find the electric field in different regions (a) Rb (d)bc.

An object is placed 15 cm before a convex lens with focal length 5 cm. A concave lens of focal length 10 cm is placed after the first lens with 20 cm separation between them. Make a ray diagram and confirm your answers by numberical calculations.

This PhysCast will look at a problem using a circuit containing a resistor and an inductor in series with a voltage source - an RL circuit.

A capacitor with C=3.1 μF is fully charged using a 6 V battery. The battery is then removed and the capacitor is connected to an uncharged capacitor with C=9.3 μF through a switch. Find the charge on each capacitor once the equilibrium is reached after closing the switch.

How do the currents flowing through copper and iron wires, of same length and diameter, compare if the same voltage is applied across them.

A capacitor with C=3.1 μF is fully charged using a 6 V battery. The battery is then removed and the capacitor is connected to an uncharged capacitor with C=9.3 μF through a switch. Find the charge on each capacitor once the equilibrium is reached after closing the switch.

This PhysCast is going to use Ampere's Law to calculate the magnetic field from a particular arrangement of a current carrying wire.