An electric dipole in an external electric field experiences oriented at 30° from the direction of the external electric field. the dipole moment of the dipole is 8.00 x101 cm a.) what is the magnitude of the external electric field? a torque of magnitude 10.0 x 10-9 nm when it is the two particles that make up the dipole are 2.5 mm apart, what is the magnitude of the charge on each particle? these questions concern a sequence of experiments with an electroscope (shown here) and a teflon rod. assume no sparks ever jump between the rod and the electroscope unless explicitly stated. initially, the electroscope's vane is closed: the angle between the vane and the post is zero. the teflon rod is rubbed with a wool cloth. the rod touches the disk and a spark is observed. the rod is then moved slowly away from the electroscope. next, the experimenter continues to hold the rod in one hand far away from the electroscope and touches the disk with a finger on the other hand. while keeping the finger on the disk, the rod is brought back toward the disk and held near the disk. you will observe that (a) the vane closes when the finger touches the disk and stays where it is as the rod is moved toward the disk (b) the vane closes when the finger touches the disk and then opens as the rod is moved toward the disk. (c) the vane opens when the finger touches the disk and then closes partway as the rod is moved toward the disk (d) the vane opens when the finger touches the disk and then opens further as the rod is moved toward the disk (e) the vane's position does not change throughout the process. circle your choice, and explain.