1. Complete each of the following statements by responding with the missing wordisl. {1) a. A positively charged glass rod is brought close to a neutral metal rod. The metal rod is momentarily grounded and than the ground is removed. The positively charged glass rod is removed, and the metal rod is left 1arith a net charge. This method of charging is called charging by {1] b. At the end of the procedure, the sign of the charge on the metal rod is and the glass rod is