How can we change the magnitude of current in a circuit?

1.	How can we change the magnitude of current in a circuit?
Answer» If you have an inductance in the\xa0circuit\xa0the\xa0current\xa0will rise until the emf generated by the inductance equals the applied voltage. The\xa0current\xa0will then continue at a rate determined by the\xa0circuit\xa0resistance. The\xa0current\xa0may be varied by\xa0varying\xa0the input voltage, or by\xa0varying\xa0the resistance of the\xa0circuit. In order to lower the amperage of an electrical\xa0circuit, you must either lower the\xa0circuit\'s\xa0voltage or increase its resistance. Lowering amperage is done by applying Ohm\'s law, given by the formula I = V/R, where I is the\xa0circuit\'s\xa0total\xa0current\xa0in amperes, V is the voltage and R is the resistance.\xa0If too much current\xa0flows, the fuse wire rises to a higher temperature and melts, thus opening the\xa0circuit, but destroying the fuse. A\xa0circuit\xa0breaker opens a\xa0circuit\xa0as soon as the\xa0current\xa0climbs to unsafe levels, and can be used repeatedly.

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