2. Which substances are used for making electromagnets?
3. Write a note on ‘ magnetic field’.
4. Why is a magnetic needle used in a compass?
5. Explain with the help of a diagram how the intensity and direction of the
magnetic field of a bar magnet can be determined.
Answers
Answer:
2.Materials List
nail, 3-inch (7.6 cm) or longer (made of zinc, iron or steel, but not aluminum)
2 feet (. 6 m) insulated copper wire (at least AWG 22 or higher)
D-cell battery.
several metal paperclips, tacks or pins.
wide rubber band.
Building an Electromagnet Worksheet.
3. The magnetic field is the area around a magnet in which there is magnetic force. Moving electric charges can make magnetic fields. ... In physics, the magnetic field is a field that passes through space and which makes a magnetic force move electric charges and magnetic dipoles.
4. The magnetic needles used in compasses are Magnetic in nature because the Earth has a strong magnetic dipole due to its dynamo effect which creates the magnetic field around the earth's surface.
Explanation: