1
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
A convex lens forms a real image of an object with magnification $m_1$. The lens is moved towards the object to obtain another real image of magnification $m_2$. The image distance is increased by $x$. The focal length of the lens is
A
$\left(\frac{m_2}{m_1}\right) x$
B
$\left(\frac{m_1}{m_2}\right) x$
C
$\frac{x}{m_2-m_1}$
D
$x\left(m_2-m_1\right)$
2
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0

For the charge configuration shown here, which of the following is not true?

COMEDK 2025 Morning Shift Physics - Electrostatics Question 11 English

A
$\frac{q_1}{q_2}=1$
B
$\left|q_1\right|=\left|q_2\right|$
C
$\left|q_1\right|>\left|q_2\right|$
D
$q_1$ and $q_2$ are negative
3
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
A bomb of mass 20 kg at rest explodes into two pieces of masses 12 kg and 8 kg . If the velocity of 8 kg mass is $6 \mathrm{~ms}^{-1}$, then the kinetic energy of the other mass is:
A
144 J
B
64 J
C
86 J
D
96 J
4
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Two identical conducting balls having positive charges $q_1$ and $q_2$ are separated by a distance $r$. If they are made to touch each other and then separated to the same distance, the force between them will be
A
Same as before
B
zero
C
Less than before
D
More than before
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