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    				| 1. | What is a solenoid ? Mention two ways to increase the strength of the field of a solenoid | 
| Answer» Solution :A coil of MANY circular turns of INSULATED copper wire wrapped closely in the shape of CYLINDER is called a solenoid. TWO ways to increase the strength of the field of a solenoid (i) By increasing the number of turns. (ii) By increasing CURRENT. | |