1
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
In a potentiometer, the area of cross-section of the wire is $4 \mathrm{~cm}^2$. The current flowing in the circuit is 1 A and the potential gradient is $7.5 \mathrm{Vm}^{-1}$. Then, the resistivity of the potentiometer wire is
A
$3 \times 10^{-3} \mathbf{q}-\mathrm{m}$
B
$2 \times 10^{-6} \mathrm{Q}-\mathrm{m}$
C
$4 \times 10^{-2} \mathbf{Q}$-m
D
$5 \times 10^{-4} \Omega$-m
2
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Drift speed $v$ varies with the intensity of electric field $E$ as per the relation.
A
$v=E$
B
$v \propto \frac{1}{E}$
C
$v=E^2$
D
$v=E^{-2}$
3
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
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
A
$30^{\circ}$
B
$45^{\circ}$
C
$\tan ^{-1}\left(\frac{3}{4}\right)$
D
$\tan ^{-1}\left(\frac{4}{3}\right)$
4
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-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
A
$96 \times 10^{-11} \mathrm{~N}, 8=\cos ^{-1}\left(\frac{2}{\sqrt{5}}\right)$
B
$96 \times 10^{-19} \mathrm{~N}, \theta=\cos ^{-1}\left(\frac{5}{\sqrt{2}}\right)$
C
$215 \times 10^{-18} \mathrm{~N}, . \theta=\cos ^{-1}\left(\frac{2}{\sqrt{5}}\right)$
D
$2.15 \times 10^{-14} \mathrm{~N}, \theta=\cos ^{-1}\left(\frac{5}{\sqrt{2}}\right)$
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