Anjali asks the following tasks to be performed by students of Class VII while making an electromagnet ( not in the correct sequence ): a. Place some pins near the end of a nail b. Switch on the current and observe what happens c. Wind a copper wire tightly around an iron nail d. Connect free ends of the wire to the terminals of a cell Which one of the following is the correct sequence of tasks to be performed to achieve the desired result? Correct Answer c, d, a, b An electromagnet is a magnet that works with help of electricity. Electromagnet strength can be changed by changing the amount of electric current that flows through it. Important Points While making an electromagnet we should follow the steps- To make electromagnets, wind the enameled copper wire tightly around the iron bolt in the form of a coil. Rub the free ends of the wires of each electromagnet with the sandpaper to remove the enamel coating. Connect free ends of the electromagnet to a battery through a switch. Place some shoe nails near the end of the bolt and switch on the current. Count the number of nails attracted by this electromagnet. Switch off the current. Now the coil loses most of its magnetism. A few nails may still cling to the electromagnet. Repeat this activity with other electromagnets. Thus from the above-mentioned points, it is clear that the Anjali asks the to be performed by students of Class VII while making an electromagnet they should follow c, d, a, b correct sequence of tasks to achieve the desired result.