Help me on this question!!

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

Which situation will produce the greatest change of momentum

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o