AP EAPCET 2024 - 19th May Evening Shift | Moving Charges and Magnetism Question 8 | Physics

A current carrying coil experiences a torque due to a magnetic field. The value of the torque is $80 \%$ of the maximum possible torque. The angle between the magnetic field and the normal to the plane of the coil is

$30^{\circ}$

$45^{\circ}$

$\tan ^{-1}\left(\frac{3}{4}\right)$

$\tan ^{-1}\left(\frac{4}{3}\right)$

AP EAPCET 2024 - 18th May Morning Shift

MCQ (Single Correct Answer)

-0

An electron in moving with a velocity $\left[\mathbf{i}+3 \hat{\mathbf{j}} \mathrm{~ms}^{-1}\right.$ in an electric field $(\hat{\mathbf{i}}+6 \hat{\mathbf{j}}+2 \hat{\mathbf{k}}) \mathrm{Vm}^{-1}$ and a magnetic field of $(\Omega \mathbf{j}+3 \mathbf{k})$ T. Then, the magnitude and direction (with $X$-axis) of the Lorentz force acting on the electron is

$96 \times 10^{-11} \mathrm{~N}, 8=\cos ^{-1}\left(\frac{2}{\sqrt{5}}\right)$

$96 \times 10^{-19} \mathrm{~N}, \theta=\cos ^{-1}\left(\frac{5}{\sqrt{2}}\right)$

$215 \times 10^{-18} \mathrm{~N}, . \theta=\cos ^{-1}\left(\frac{2}{\sqrt{5}}\right)$

$2.15 \times 10^{-14} \mathrm{~N}, \theta=\cos ^{-1}\left(\frac{5}{\sqrt{2}}\right)$

AP EAPCET 2022 - 5th July Morning Shift

MCQ (Single Correct Answer)

-0

An electron having kinetic energy of 100 eV circulates in a path of radius 10 cm in a magnetic field. The magnitude of magnetic field $$|\mathbf{B}|$$ is approximately [Mass of electron $$=0.5 \mathrm{~MeV} \mathrm{c}^{-2}$$, where c is the velocity of light].

$$3.3 \times 10^{-4} \mathrm{~T}$$

$$2.6 \times 10^{-4} \mathrm{~T}$$

$$1.70 \times 10^{-4} \mathrm{~T}$$

$$4.3 \times 10^{-4} \mathrm{~T}$$

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