AP EAPCET 2024 - 20th May Evening Shift | Moving Charges and Magnetism Question 11 | Physics

Two long straight parallel conductors $A$ and $B$ carrying currents 4.5 A and 8 A respectively, are separated by 25 cm in air. The resultant magnetic field at a point which is at a distance of 15 cm from conductor $A$ and 20 cm from conductor $B$ is

$2 \times 10^{-5} \mathrm{~N}$

$2 \times 10^{-4} \mathrm{~N}$

$10^{-5} \mathrm{~N}$

$10^{-4} \mathrm{~N}$

AP EAPCET 2024 - 20th May Evening Shift

MCQ (Single Correct Answer)

-0

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

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