How Much Electricity Can be generated using a magnet and a coil?

Impractical. Less than 0.5V AC and about 10mA non continuous power. Never able to charge any small cell. Ball shape magnet. Ball shape coil to contain the rolling magnet. To get higher voltage,use more turns of coil. To get higher current,use thicker wire.The magnet strength also affect voltage and current. Small size makes it even useless. 1N4007 to make a full wave bridge and a filter capacitor 1000uF 16V. REMARK: I got a flashlight power by moving magnet from a dollar shop. Magnet moves up and down by shacking it. It contains a 2.4V mini rechargeable cell to light up one 2V white LED. Shack it one thousand time can support one minute light up time.

The voltage generated by a magnet and a coil is given by E=N*rate of change of flux with respect to time. The flux of interest is the flux that goes through the coil. N is the number of turns in the coil. The problem with your idea is that the flux of the magnet that goes through the coil will be tiny and the generated voltage will be essentially zero.

is this practical? NO!!. To generate electricity using coil and magnet, it is depending on DISTANCE (R) as function of magnetic strength. Each individual will create unique distance between his leg depends on behavior and walkway's constraint. how much electricity can be generated ( volts and ampere ) ? it will vary depending the leg's distance. would be enough to charge a small battery (like that of a mobile) over a period of few hours (3-5)? clue: see the nameplate of mobile phone's charger. Get the Power. Multiply with 3 hours. you get Joule. Compare with this site http://www.fao.org/docrep/007/y5686e/y5686e07.htm idea suggestion : Have you think about paving electricity in reverse way? by generating from your own feet, collect the generation to capacitors, regulate it?

Impractical. Less than 0.5V AC and about 10mA non continuous power. Never able to charge any small cell. Ball shape magnet. Ball shape coil to contain the rolling magnet. To get higher voltage,use more turns of coil. To get higher current,use thicker wire.The magnet strength also affect voltage and current. Small size makes it even useless. 1N4007 to make a full wave bridge and a filter capacitor 1000uF 16V. REMARK: I got a flashlight power by moving magnet from a dollar shop. Magnet moves up and down by shacking it. It contains a 2.4V mini rechargeable cell to light up one 2V white LED. Shack it one thousand time can support one minute light up time.

The voltage generated by a magnet and a coil is given by E=N*rate of change of flux with respect to time. The flux of interest is the flux that goes through the coil. N is the number of turns in the coil. The problem with your idea is that the flux of the magnet that goes through the coil will be tiny and the generated voltage will be essentially zero.

see electricity is nothing but flow of free electrons from a mettalic surface this is quite simple process the equipment we use is sophisticated to generate and supply it makes it a complicated one every metal has free electrons and when electrons get exicited these electrons from from higher potential to lower potential zones and this flow is now to be voltage and the speed with which they flow is current or amperage