| ASSERTION: Magnetic field lines can be entirely confined within the core of a toroid, but not within a straight solenoid. |
| REASON: The magnetic field inside the solenoid is uniform. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: B
Solution :
Magnetic field lines can be entirely confined to the core of a toroid because toroid has no ends. It can confine the field with in its core. A straight solenoid has two ends. If the entire flux were confined between these ends, the flux throughout the cross section at each end would be non-zero.
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