JEE MAIN - Physics (2021 - 18th March Morning Shift - No. 5)
Four identical long solenoids A, B, C and D are connected to each other as shown in the figure. If the magnetic field at the center of A is 3T, the field at the center of C would be : (Assume that the magnetic field is confined with in the volume of respective solenoid).
_18th_March_Morning_Shift_en_5_1.png)
12T
6T
9T
1T
Explanation
_18th_March_Morning_Shift_en_5_2.png)
$$3{I_1} = {i}$$
$$ \Rightarrow $$ $${I_1} = {{{i}} \over 3}$$
$$B = {\mu _0}n{i} = 3T$$
$${B_C} = {\mu _0}n{I_1}$$
$$ \Rightarrow $$ $${B_C} = {\mu _0}n{{{i}} \over 3} = {{3T} \over 3} = 1T$$
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