1
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Two capacitors $\mathrm{C}_1$ and $\mathrm{C}_2$ are charged to 100 V and 120 V respectively. It is found that upon connecting them together in parallel, the potential on each one of them is zero. Therefore
A
$\mathrm{C}_1+3 \mathrm{C}_2=0$
B
$5 \mathrm{C}_1=3 \mathrm{C}_2$
C
$5 \mathrm{C}_1+6 \mathrm{C}_2=0$
D
$5 \mathrm{C}_1=6 \mathrm{C}_2$
2
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Two very long, straight, parallel wires carry steady currents I and 21 respectively. The distance between the wires is d . At a certain instant of time, a point charge $q$ is at a point equidistant from the two wires, in the plane of the wires. Its instantaneous velocity is v perpendicular to this plane. The magnitude of the force due to the magnetic field acting on the charge at this instant is
A
$\frac{\mu_o I q v}{\pi d}$
B
zero
C
$\frac{2 \mu_o I q v}{\pi d}$
D
$\frac{\mu_o I q v}{2 \pi d}$
3
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
A bulb of resistance 280 Ohm is supplied with a voltage $\mathrm{V}=400 \sin \pi \mathrm{t}$. The peak current is
A
2.22 A
B
2.02 A
C
1.11 A
D
1.43 A
4
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
A wooden block floats with $\frac{3}{5}$ of its volume submerged in a tank of water. If a denser liquid is poured into the tank, the wooden block floats with half its volume in the liquid and the remaining half in water. The relative density of the liquid is:
A
$\frac{1}{2}$
B
$\frac{1}{3}$
C
$\frac{1}{6}$
D
$\frac{1}{5}$
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