Question

Transfer this Active voice sentence to the Passive one: Sandra gave Mark an apple.1. An apple was given to Sandra by Mark.2. Sandra was given to Mark by an apple.3. An apple was given to Mark by Sandra.4. An apple had been given to Mark by Sandra.

Answer 1

Inductor: They are used to block AC while allowing DC to pass; inductorsdesigned for this purpose are called chokes. They are also used in electronic filters to separate signals of different frequencies, and in combination with capacitors to make tuned circuits, used to tune radio and TV receivers.