1

JEE Main 2021 (Online) 27th August Morning Shift

Numerical

+4

-1

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 V

_{0}. The ratio of magnetic moment of the coils in case of equilateral triangle to that for square is 1 : $$\sqrt y $$ where y is ................. .Your input ____

2

JEE Main 2021 (Online) 26th August Evening Shift

Numerical

+4

-1

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 .................Your input ____

3

JEE Main 2021 (Online) 26th August Morning Shift

Numerical

+4

-1

Two short magnetic dipoles m

_{1}and m_{2}each having magnetic moment of 1 Am^{2}are placed at point O and P respectively. The distance between OP is 1 meter. The torque experienced by the magnetic dipole m_{2}due to the presence of m_{1}is ........... $$\times$$ 10^{$$-$$7}Nm.Your input ____

4

JEE Main 2020 (Online) 3rd September Evening Slot

Numerical

+4

-0

A galvanometer coil has 500 turns and each turn has an average area of 3 $$ \times $$ 10

^{–4}m^{2}. 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 ______.Your input ____

Questions Asked from Magnetic Effect of Current (Numerical)

Number in Brackets after Paper Indicates No. of Questions

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