AP EAPCET 2024 - 21th May Morning Shift | Moving Charges and Magnetism Question 5 | Physics

When an electron placed in a uniform magnetic field is accelerated from rest through a potential difference $V_1$. It experiences a force $F$. If the potential difference is changed to $V_2$, the force experienced by the electron in same magnetic field is $2 F$, then the ratio of potential differences $\frac{V_2}{V_1}$ is

$2: 1$

$1: 4$

$4: 1$

$1: 2$

AP EAPCET 2024 - 21th May Morning Shift

MCQ (Single Correct Answer)

-0

A rectangular loop of sides 25 cm and 10 cm carrying a current of 10 A is placed with its longer side parallel to a long straight conductor 10 cm apart carrying current 25 A . The net force on the loop is

$6.25 \times 10^{-5} \mathrm{~N}$

$5.5 \times 10^{-5} \mathrm{~N}$

$3.75 \times 10^{-5} \mathrm{~N}$

$8.75 \times 10^{-11} \mathrm{~N}$

AP EAPCET 2024 - 20th May Evening Shift

MCQ (Single Correct Answer)

-0

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!

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