After this lesson, you should be able to:

• Demonstrate the existence of a magnetic field near a current carrying wire using a compass
• Use an appropriate right-hand-rule to determine the direction of the magnetic field lines around (i) a straight current carrying wire, (ii) a current carrying loop and (iii) a solenoid
• Draw magnetic field lines around (i) a straight current carrying wire, (ii) a current carrying loop and (iii) a solenoid
• Compare the magnetic fields of a solenoid and of a bar magnet
• Discuss qualitatively the possible environmental impact of overhead electrical cables