Q11 of 24 Page 369

Why are the magnetic field lines close curves?


Magnetic field lines originate from North pole and merge at the South pole outside magnet. Inside the magnet, they direct from South to North pole. So, they form a closed curve.

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9

A student while studying the force experienced by a current-carrying conductor kept in a magnetic field records the following observations:

i. The force experienced by the conductor increases as the current is increased.


ii. The force experienced by the conductor decreases as the strength of the magnetic field is increased.


Which of the two observations is correct and why?

 10

Copy and complete the diagrams to show the shape and direction of the magnetic field between the magnetic poles.

 12

If instead of electron a neutron enters a field, what will be its direction of motion? Give reasons for your answer.

 13

What is the principle of an electric generator?