AC and DC power supplies

Numéro d’image : 11892463
AC and DC power supplies
AC and DC power supplies displayed on the screen of an oscilloscope (centre). Direct current (DC,the straight line) is produced by the equipment at left,while alternating current (AC,waveform) is produced by the equipment at right. Both currents are powering lamps at lower centre. The grey box (left) is a smoothing unit that is needed to form smooth DC from AC. Many electrical devices need to have the mains AC power supply altered in this way to run safely. The DC supply is seen to be about 0.7 times the peak AC value. This is known as the RMS (root mean square) value
Licence : Droits gérés
Crédit: Science Photo Library / Andrew Lambert Photography
Taille de l’image : 4929 px × 3576 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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