How is an electromagnet made ? Write any two ways by which the strength of electromagnet can be increased.

Question

Accepted Answer

## Model Answer An electromagnet is made by winding a coil of insulated copper wire around a soft iron core and passing electric current through the coil. **Two ways to increase its strength:** 1. Increasing the number of turns of wire in the coil. 2. Increasing the electric current flowing through the coil. *Source: Chapter 12, Section 12.2.4* --- ## Explanation - The textbook defines an electromagnet as "a core of soft iron wrapped around with a coil of insulated copper wire" — use this exact phrasing. - For the two ways, examiners accept: increasing turns, increasing current, or using a stronger/larger soft iron core. Pick any two clearly stated points. - Do not confuse electromagnet construction with a solenoid alone — the soft iron core is the key distinguishing feature.

Science (086) — CBSE Class 10 board question