1
JEE Main 2021 (Online) 27th August Morning Shift
Numerical
+4
-1
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A uniform conducting wire of length is 24a, and resistance R is wound up as a current carrying coil in the shape of an equilateral triangle of side 'a' and then in the form of a square of side 'a'. The coil is connected to a voltage source V0. The ratio of magnetic moment of the coils in case of equilateral triangle to that for square is 1 : $$\sqrt y $$ where y is ................. .
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2
JEE Main 2021 (Online) 26th August Evening Shift
Numerical
+4
-1
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A coil in the shape of an equilateral triangle of side 10 cm lies in a vertical plane between the pole pieces of permanent magnet producing a horizontal magnetic field 20 mT. The torque acting on the coil when a current of 0.2 A is passed through it and its plane becomes parallel to the magnetic field will be $$\sqrt x $$ $$\times$$ 10$$-$$5 Nm. The value of x is .................
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3
JEE Main 2021 (Online) 26th August Morning Shift
Numerical
+4
-1
Change Language
Two short magnetic dipoles m1 and m2 each having magnetic moment of 1 Am2 are placed at point O and P respectively. The distance between OP is 1 meter. The torque experienced by the magnetic dipole m2 due to the presence of m1 is ........... $$\times$$ 10$$-$$7 Nm.

JEE Main 2021 (Online) 26th August Morning Shift Physics - Magnetic Effect of Current Question 99 English
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4
JEE Main 2020 (Online) 3rd September Evening Slot
Numerical
+4
-0
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A galvanometer coil has 500 turns and each turn has an average area of 3 $$ \times $$ 10–4 m2 . If a torque of 1.5 Nm is required to keep this coil parallel to a magnetic field when a current of 0.5 A is flowing through it, the strength of the field (in T) is ______.
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