Excitation (magnetic)An electric generator or electric motor consists of a rotor spinning in a magnetic field. The magnetic field may be produced by permanent magnets or by field coils. In the case of a machine with field coils, a current must flow in the coils to generate the field, otherwise no power is transferred to or from the rotor. The process of generating a magnetic field by means of an electric current is called excitati...
Sunday, 16 June 2013
Saturday, 8 June 2013
How much you paid for this stuff? Last week I bought this Vivis powerbank at Lowyat. This powerbank cost me about RM95.Spec:5200mah high capacity rechargeable li-ion batterybattery level ondicatorpocket sizeo/p current 1Ai/p curren 0.8Ao/p voltage 5Vi/p voltage 5VWhy need this power bank? This is because i am a traveller. That powerbank should be enough for me to charge at least 3 times my pho...
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