AP EAPCET 2024 - 21th May Evening Shift | Moving Charges and Magnetism Question 7 | Physics

A proton and an alpha particle moving with energies in the ratio $1: 4$ enter a uniform magnetic field of 3 T at right angles to the direction of magnetic field. The ratio of the magnetic forces acting on the proton and the alpha particle is

$1: 2$

$1: 4$

$2: 3$

$1: 3$

AP EAPCET 2024 - 21th May Evening Shift

MCQ (Single Correct Answer)

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A charged particle moving along a straight line path enters a uniform magnetic field of 4 mT at right angles to the direction of the magnetic field. If the specific charge of the charged particle is $8 \times 10^7 \mathrm{C} \mathrm{kg}^{-1}$. The angular velocity of the particle in the magnetic field is

$64 \times 10^4 \mathrm{rad} \mathrm{s}^{-1}$

$32 \times 10^4 \mathrm{rad} \mathrm{s}^{-1}$

$16 \times 10^4 \mathrm{rad} \mathrm{s}^{-1}$

$48 \times 10^4 \mathrm{rad} \mathrm{s}^{-1}$

AP EAPCET 2024 - 21th May Morning Shift

MCQ (Single Correct Answer)

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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)

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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

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

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

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

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

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