Measuring electric current. Circuit diagram showing the arrangement of equipment used to measure electric current flowing through a component. The components are represented by standard symbols. At left is a battery consisting of two cells; a resistor is at right; an open switch is at bottom; and an ammeter is at top. When the switch is closed, the potential difference (voltage) of the battery will cause electric current to flow round the circuit. The value of the electric current will vary depending on the value of the resistor. The ammeter is used to measure the amount of electric current.
Science Photo Library was founded in 1981 by Michael Marten, one of the authors of "Worlds Within Worlds", a book exploring different ways to observe the universe - from electron micrographs, to images of earthrise taken from the Apollo spacecraft. When Marten started receiving requests for the beautiful images in the book, he had an idea of setting up Science Photo Library.
Since then, Science Photo Library has continued to work alongside world acclaimed photographers and the leading science and medical experts to provide a central source of the best science and specialist imagery available. Although the collection started with scientific images, it has grown to encompass all aspects of science and their impact on everyday life.
Shop with Confidence (Fine Art America Return Policy)
Our return policy is very simple:
If you're not happy with a purchase that you made on FineArtAmerica.com, for any reason, you can return it to us within 30 days of the order date. As soon as it arrives, we'll issue a full refund for the entire purchase price. Please note - Fine Art America does not reimburse the outgoing or return shipping charges unless the return is due to a defect in quality.