JEE PYQ: Magnetic Effects Of Current Question 5
Question 5 - 2021 (18 Mar 2021 Shift 1)
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 $3$ T, the field at the center of C would be: (Assume that the magnetic field is confined with in the volume of respective solenoid).
(1) $12$ T
(2) $6$ T
(3) $9$ T
(4) $1$ T
Show Answer
Answer: (4) $1$ T
Solution
Since the solenoids are connected in a network, current splits. $\phi \propto i$, $B \propto i$. The field at the centre of C is $\frac{3}{3} = 1$ T.
BETA
