The correct direction of the magnetic field in the given figures is shown by:
Which of the following is the correct representation of magnetic field lines?
1. (g), (c)
2. (d), (f)
3. (a), (b)
4. (c), (e)
The magnetic lines of force inside a bar magnet are:
|1.||from south to the north pole.|
|2.||from north to the south pole.|
|4.||intersecting each other.|
Which one of the following is correct?
|1.||The magnetic field lines also represent the lines of force on a moving charged particle at every point.|
|2.||Magnetic field lines can be entirely confined within the core of a toroid, but not within a straight solenoid.|
|3.||A bar magnet exerts a torque on itself due to its own field.|
|4.||Magnetic field arises due to stationary charges.|
If a magnetic needle is made to vibrate in uniform field H, then its time period is T. If it vibrates in the field of intensity 4H, its time period will be: