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Magnetics question

2022 · 25 Jun · Shift 2 · Q56

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JEE Main
Physics
Magnetics
2022 · 25 Jun · Shift 2 · Q56

Magnetics question

2022 · 25 Jun · Shift 2 · Q56

JEE MainPhysicsMagneticsMCQ+4 / −1

A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of magnetic field will be equal to

A
B
B
2B
C
4B
D
${B \over 2}$

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