1
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
A symmetric double convex lens is cut into two equal parts by a plane perpendicular to the principal axis. If the power of the original lens is 4D, the difference between the powers of the original lens and the cut lens is
A
zero
B
3D
C
D
D
2D
2
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Three identical conducting balls $\mathrm{A}, \mathrm{B}$ and C , each of mass m , are thrown upward at an angle $\Theta$ to the horizontal with an initial speed $v$ in a region of space that has a uniform electric field $E$ downward along with the gravitational field $g . A$ is positively charged, B is uncharged and C is negatively charged. Rank the ranges R of these three balls in increasing order.
A
$R_A< R_B< R_C$
B
$R_B< R_C< R_A$
C
$R_A=R_B< R_C$
D
$R_C< R_B< R_A$
3
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
In a single slit Fraunhofer diffraction pattern obtained at normal incidence, at the angular position of the second diffraction minimum the phase difference (in radian) between the waves from the opposite edges of the slit is
A
$\pi$
B
zero
C
$2\pi$
D
$\frac{\pi}{2}$
4
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
The magnetic flux $\phi$ through a stationary loop of wire having a resistance R varies with time as $\phi=4 t^2+3 t$. The average emf and total charge flowing in the loop in the time interval $t=0$ to $t=\tau$ respectively are
A
$\tau+3, \quad \frac{4 \tau^2+3 \tau}{R}$
B
$3 \tau+4, \quad \frac{4 \tau^2+3 \tau}{R}$
C
$4 \tau+3, \quad \frac{4 r+3}{R}$
D
$4 \tau+3, \quad \frac{4 \tau^2+3 \tau}{R}$
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12