AP EAPCET 2024 - 20th May Evening Shift | Moving Charges and Magnetism Question 4 | Physics

Two concentric thin circular rings of radii 50 cm and 40 cm , each carry a current of 3.5 A in opposite directions. If the two rings are coplanar, the net magnetic field due to the rings at their centre is

$11 \times 10^{-7} \mathrm{~T}$

$17 \times 10^{-7} \mathrm{~T}$

$22 \times 10^{-7} \mathrm{~T}$

#VALUE!

AP EAPCET 2024 - 20th May Morning Shift

MCQ (Single Correct Answer)

-0

In hydrogen atom an electron is making $6.6 \times 10^{15} \mathrm{rev} / \mathrm{s}$ around the nucleus of radius $0.47 $$\mathop A\limits^o $. The magnetic field induction produced at the centre of the orbit is nearly.

$0.14 \mathrm{~Wb} \mathrm{~m}^{-2}$

$1.4 \mathrm{~Wb} \mathrm{~m}^{-2}$

$14 \mathrm{~Wb} \mathrm{~m}^{-2}$

$140 \mathrm{~Wb} \mathrm{~m}^{-2}$

AP EAPCET 2024 - 20th May Morning Shift

MCQ (Single Correct Answer)

-0

When two coaxial coils having same current in same direction are brought to each other, then the value of current in both the coils

increases

decreases

remains same

increases in one coil and decreases in other coil

AP EAPCET 2024 - 19th May Evening Shift

MCQ (Single Correct Answer)

-0

A wire shaped in a regular hexagon of side 2 cm carries a current of 4 A . The magnetic field at the centre of hexagon is AP EAPCET 2024 - 19th May Evening Shift Physics - Moving Charges and Magnetism Question 9 English

AP EAPCET 2024 - 19th May Evening Shift Physics - Moving Charges and Magnetism Question 9 English

$4 \sqrt{3} \times 10^{-5} \mathrm{~T}$

$8 \sqrt{3} \times 10^{-5} \mathrm{~T}$

$\sqrt{3} \times 10^{-5} \mathrm{~T}$

$6 \sqrt{3} \times 10^{-5} \mathrm{~T}$

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