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7th Grade Science AC DC parallel series 3An atom that has more electrons than protons will have a ____ charge. magnetic neutral positive negative 4Charges that collect on a surface and remain are called ______ electricity. AC DC current static 4Materials that will not let electrons flow through them are called _____. conductors fuses insulators generators semiconductors 3The basic unit of electric charge is the _____. ampere coulomb ohm volt watt 2A meter that measures very small electrical currents is called ____. ammeter galvanometer ohmmeter voltmeter none of these 2The simplest of all generators are small ones called _____. armatures magnetos solenoids transformers diodes 2An electrical cell that uses chemicals dissolved in water is called a _____. dry cell solar cell storage battery wet cell 4In a wet cell, the cathode is the electrode that becomes charged ____. negatively positively both of these neither of these 1What substance are most solar cells made from? carbon copper silicon zinc iron 3Lights would be brighter in what kind of circuit? AC DC parallel series 3