1
COMEDK 2025 Evening Shift
MCQ (Single Correct Answer)
+1
-0
A beam of incident parallel light falls on a diverging lens of focal length 20 cm in magnitude. If a converging lens of focal length 15 cm in magnitude is placed at a distance of 10 cm to the right of the diverging lens on the other side, then, the final image formed is:
A
Virtual and is at a distance of 30 cm to the right of the converging lens.
B
Virtual and is at a distance of 40 cm to the right of the diverging lens.
C
Real and is at a distance of 30 cm to the right of the converging lens.
D
Real and is at a distance of 40 cm to the right of the converging lens.
2
COMEDK 2025 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The total number of degrees of freedom associated with $2 \mathrm{~cm}^3$ of Nitrogen gas at normal temperature and pressure is:

[Given Avogadro number as ' N ' ]

A
$\frac{N}{44800}$
B
$\frac{N}{4480}$
C
$\frac{N}{2240}$
D
$\frac{N}{22400}$
3
COMEDK 2025 Evening Shift
MCQ (Single Correct Answer)
+1
-0
A bob of a simple pendulum has a mass of 4 g and a charge of $20 \mu \mathrm{C}$. If it is at rest in a uniform horizontal electric field of intensity $1000 \mathrm{Vm}^{-1}$, the angle that the pendulum makes with the vertical at equilibrium is:
A
$\tan ^{-1} \frac{1}{2}$
B
$60^{\circ}$
C
$30^{\circ}$
D
$\tan ^{-1} 2$
4
COMEDK 2025 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Three charges, $Q,-q$ and $2 q$ are placed at the vertices of a right-angled isosceles triangle. What is the value of $q$ for the net electrostatic energy of the configuration to be zero?

COMEDK 2025 Evening Shift Physics - Electrostatics Question 1 English

A
$Q\left[\frac{1}{2 \sqrt{2}}-1\right]$
B
$Q\left[1-\frac{1}{2 \sqrt{2}}\right]$
C
$Q\left[1+\frac{1}{2 \sqrt{2}}\right]$
D
$Q\left[\frac{2 \sqrt{2}+1}{2}\right]$
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