1
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Emission of electrons from a metal plate illuminated with monochromatic electromagnetic radiation will always take place provided
A
The plate is positively charged
B
The plate is negatively charged
C
The radiation is sufficiently intense
D
The work function of the plate is less than the energy of a single photon and the plate is uncharged
2
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
A charged particle is released from rest in a region of space in which steady and uniform electric and magnetic fields are parallel to each other. The particle will move in a
A
Helix
B
Straight line
C
Cycloid
D
Circle
3
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
If E is the amplitude of the electric field of the waves starting from the slits in a double slit experiment and $\theta$ is the phase difference between the waves reaching a point on the screen, the ratio of the amplitude of the resultant electric field at that point on the screen to the amplitude at one of the slits is
A
$\cos (\theta)$
B
$2 \cos (\theta)$
C
$\cos \left(\frac{\theta}{2}\right)$
D
$2 \cos \left(\frac{\theta}{2}\right)$
4
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Two coherent waves of intensities $I_1$ and $I_2$ pass through a region at the same time in the same direction. The sum of maximum to minimum intensities is
A
$\left(I_1+I_2\right)$
B
$2\left(I_1+I_2\right)$
C
$2\left(\sqrt{I_1}+\sqrt{I_2}\right)^2$
D
$\left(I_1+I_2\right)^2$
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