Recent content by svar

thanks folks, problem solved, thanks to prof. walter lewin of MIT on his utube lectures. If E inside the sphere is zero, then F on a charge in the sphere is zero, therefore W done on the charge is zero as it moves about in the sphere, delta V is therefore zero, and V = the the value at the...

can someone explain how the potential inside a sphere is constant, in terms of using coulomb's law and knowledge of charge in an electric field, without directly invoking gauss's law or the partial derivative for rate of change in potential. the graphs depicting potential around a sphere show...

Power station generates 120kW Electricity can be transmitted either at 240V or at 24000V using a step-up transformer. The cables have total resistance of 0.4W What is the power loss when voltage is transmitted at: 1) 240V 2) 24000V I AM SURE YOU CAN WORK THIS OUT USING I...

PD is the amount of energy per unit charge used between two points in a circuit. compare this to EMF which is the amount of energy provided to unit charge between two points. PD is across a resistor or any component that uses energy - bulb, wire, motor. Currrent is zero when there is no PD...

key point is to take each object individually. think: you pushing a key on a keyboard. individually, let's look at you. you push the key with a force. now look at the key, the key pushes your finger with equal force in opposite direction. both forces are similar because both are forces that push...

i reckon the energy of the nucleons is very low in the well, ie the nucleons are most stable there (due to conditions given by strong nuclear force), the rapid peak indicates that outside this radius, the energetic stability is very low, hence peak energy value, this subsides with increasing...