C: diode
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A teacher sticks a magnet to the top surface of a match-box cover. The bottom surface is placed in a small tray of ir…
The diagrams show a small compass close to a strong bar magnet. Which diagram shows the correct compass direction?
A wire hangs between the poles of a magnet. When there is a current in the wire, in which direction does the wire move?
What causes the fuse to blow in a mains electrical circuit?
Which electrical component is used to store charge?
The radioactive isotope radium-226 may be shown as ⁸⁸²²⁶Ra. How many protons does an atom of radium contain?