Choose the false statement concerning parallel circuits. a. the voltage across each branch of the circuit is the same. b. current can vary in different branches of a circuit depending on the resistance in those branches. c. the reciprocal of the total resistance is equal to the sum of the reciprocals of the resistances in each branch of a circuit. d. none of these statements is false.

During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.

If the area of a square has increased by a factor of 16, by how much has each side increased?

Consider an air-filled charged capacitor. how can its capacitance be increased?