Parallel circuits, experiments. Voltage, or potential difference, across each branch of a parallel circuit is the same Schematic showing wires, bulb, resistor, and battery. Vector illustration stock illustration...

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What's a royalty-free license?

Royalty-free licenses let you pay once to use copyrighted images and video clips in personal and commercial projects on an ongoing basis without requiring additional payments each time you use that content. It's a win-win, and it's why everything on iStock is only available royalty-free — including all Scientific Experiment images and footage.

What kinds of royalty-free files are available on iStock?

Royalty-free licenses are the best option for anyone who needs to use stock images commercially, which is why every file on iStock — whether it’s a photo, illustration or video clip — is only available royalty-free.

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