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प्रश्न
A soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid:
(a) will decrease
(b) will increase
(c) will become zero
(d) will remain the same
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उत्तर
will increase
If a soft iron bar is inserted inside a current-carrying solenoid, the magnetic field inside the solenoid will increase.
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