A negative test charge sits in an electric field that is created by a positive source charge. Work is done by the charge resulting in change of electric potential energy of |20 Joules|. Does the charge move towards or away the source charge? Justify you answer by explaining the change of energy and work of the system.

When an object moves in uniform circular motion, the direction of its acceleration is a) in the same direction as its velocity vector. b) in the opposite direction of its velocity vector c) is directed toward the center of its circular path. d) is directed away from the center of its circular path. e) depends on the speed of the object.

State the right hand rule of the direction of magnetic field in a conductor carrying current

**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z