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What causes current flow?
Current flows due to gravity. Example is the water current on a river. Wind is also another factor that causes current to flow, just like ocean water.
Why secondary terminal voltage decreases with increase in load?
An increase in load (equivalent to a decrease in resistance*) causes an increase in load current. This increases the internal voltage drop within the transformer, and the terminal voltage reduces accordingly.[*An increase in load means more current is being drawn by that load, so an increase in load is equivalent to a decrease in load resistance]
What are the differences between emf and voltage drop?
emf and voltageAnswerElectromotive force is the potential difference created by a source, such as a battery or generator, when it is not connected to a load -in other words, on 'open circuit'.Voltage drop is the potential difference across a load, such as a resistor, which causes current to flow through that load.A voltage drop occurs, internally, in batteries and generators, when they are supplying a load. The battery or generator's terminal voltage, when supplying a load, is its e.m.f. less its internal voltage drop.
How does the regulator control the output to the battery?
the regulator monitors battery or system voltage and adjusts current flow or magnetic field to the rotor. The magnetism of the rotor causes power to be generated in the stator. This supplies power to run the vehicle ands charge the battery. In other words the regulator adjusts the magnetic power required to make electricity. In operation it keeps vehicle system voltage to between 14.0 to 14.7 volts.
Does a discharging battery can cause health problems?
Not a 'discharging' battery. Depends on the type of battery. A lead acid battery gives off Hydrogen when 'charging', which could be hazardous to health, if a spark causes it to explode. A 'discharged' battery can have an impact on it's own health. Best to keep them charged.
