Question

When recording, the recording head of video tape recorder utilizes a changing electronic signal which is transformed into a changing:

1. current
2. magnetic field
3. electronic pulse
4. video signal

Answer 1

The changing electronic signal in a video tape recorder is transformed into a changing magnetic field by the recording head, which then alters the magnetic orientation on the tape to record the data. Option 2 is correct.

Step-by-step explanation:

When recording, the recording head of a video tape recorder utilizes a changing electronic signal which is transformed into a changing magnetic field. An electromagnet in the recording head receives a signal from a microphone or camera, where the input current corresponds to the signal strength and frequency.

This current produces various orientations of the magnetic field, which in turn changes the orientation of iron oxide molecules on the video tape, effectively recording the audio or video signal. Upon playback, these magnetic orientations induce an emf in the playback head's coil, which converts back into an electronic signal to produce sound or video.

The recording head of the video tape recorder utilizes a changing electronic signal which is transformed into a changing magnetic field. The magnetic field orientations of the iron oxide molecules on the tape are changed as the tape moves past the recording head, thus recording the signal. In the playback mode, the different magnetic field orientations of the iron oxide molecules induce an emf in the coil of wire in the playback head.