An electric bell takes a current of 0.2ammpere from a battery of 2 dry cell connected in series . Each cell has am EMF of 1.5v and resistance of 1.5v. calculate the effective resistance of the bell​

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.