Question
Science Question on Magnetic Field Due To A Current-Carrying Conductor
State whether the following statements are true or false.
- The field at the centre of a long circular coil carrying current will be parallel straight lines.
- A wire with a green insulation is usually the live wire of an electric supply.
Answer
(a) True: A long circular coil is a long solenoid. The magnetic field lines inside the solenoid are parallel lines.
(b) False: Live wire has red insulation cover, whereas earth wire has green insulation colour in the domestic circuits.