alleryStart learning →Many loops of wire are wound into a cylindrical coil so that the field of each loop adds to the next. What is this coil called?
AA solenoid
BA capacitor
CA resistor
DA rheostat
Answer & Solution
Correct answer: A. A solenoid
1. Each single loop of current-carrying wire sets up its own magnetic field.
2. Adding loops with the current in the same direction makes the fields add and grow stronger.
3. A cylindrical coil of many such loops is called a solenoid.
4. The field pattern around a solenoid looks like that of a bar magnet, with a north and a south end.
_Source: Siyavula Physical Sciences Grade 11 (Everything Science, CC BY 4.0), Chapter 10: Electromagnetism_
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