A uniform electric field $E=3 \hat{i}+6 \hat{j}+\hat{k}$ passes through a closed cuboidal surface. One face of the cuboid has an area $4 m^2$ and an outward unit normal given by $\frac{2 \hat{i}+2 \hat{j}+3 \hat{k}}{\sqrt{17}}$. If the electric flux through the remaining 5 faces is zero, the charge enclosed by the cuboid is:
Cannot be determined
$\frac{84 \epsilon_0}{\sqrt{17}}$
zero
$\frac{\sqrt{17}}{84 \epsilon_0}$
A particle starts rotating from rest. The instantaneous angular displacement is $\theta=3 t^3-t^2$, where $\theta$ is in radian and $t$ in s; The angular velocity at $t=1 \mathrm{~s}$ is
$9 \mathrm{rads}^{-1}$
$7 \mathrm{rads}^{-1}$
$3 \mathrm{rads}^{-1}$
$1 \mathrm{rads}^{-1}$
Point charge $\sqrt{2} C, \sqrt{2} C$, and $-2 C$ are placed at the three vertices of a right-angled triangle in air. [as shown in the figure below]
What is the electric field at a point $P$ on the hypotenuse that is equidistant from all three charges.
Given distances $X P=Y P=Z P=0.5 \mathrm{~m}$

$0 \cdot 72 \times 10^{10} N C^{-1} \quad$ along YP
$7.2 \times 10^{10} N C^{-1} \quad$ along PY
$0.72 \times 10^9 \mathrm{NC}^{-1} \quad$ along YP
$7.2 \times 10^9 \mathrm{NC}^{-1} \quad$ along PY
A solenoid having resistance $R=60 \Omega$ and inductance $L=0.4 \mathrm{H}$ is connected to an AC source $V=100 \sqrt{2} \sin 200 t$.
Find the maximum current.
1.732 A
2.828 A
1.414 A
0.707 A
COMEDK Papers
All year-wise previous year question papers