Teaching RPSC School Lecturer Mock Test Series 2024 Physics Moving Charges and Magnetism Solenoids and Toroids
A one-meter long solenoid of N turns per unit length has a current I flowing throwing it, producing a magnetic field intensity of B inside the coil. If the current is halved and the conducting wire of solenoid is made two times thicker, the ratio of their magnetic field inside the coils are
1
2 : 3
2
4 : 1
3
1 : 4
4
3 : 2
5
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