1
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

A body initially at rest undergoes rectilinear motion. The forcetime (F-t) graph for the motion of the body is given below. Find the linear momentum gained by the body in $$2 \mathrm{~s}$$.

COMEDK 2024 Evening Shift Physics - Laws of Motion Question 4 English

A
$$ \pi N-s $$
B
$$ \frac{\pi}{2} \mathrm{~N}-\mathrm{s} $$
C
$$ \frac{\pi}{4} N-s $$
D
$$ 2 \pi N-s $$
2
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Incident light of wavelength $$\lambda=800 \mathrm{~nm}$$ produces a diffraction pattern on a screen $$1.5 \mathrm{~m}$$ away when it passes through a single slit of width $$0.5 \mathrm{~mm}$$. The distance between the first dark fringes on either side of the central bright fringe is

A
2.4 mm
B
2.4 cm
C
4.8 cm
D
4.8 mm
3
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

A transformer of $$100 \%$$ efficiency has 200 turns in the primary and 40000 turns in the secondary. It is connected to a $$220 \mathrm{~V}$$ main supply and secondary feeds to a $$100 \mathrm{~K} \Omega$$ resistance. The potential difference per turn is

A
11 V
B
18 V
C
25 V
D
1.1 V
4
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Action and reaction can never balance out because

A
They are unequal in magnitudes
B
Though they are equal in magnitude and opposite in direction they act on different bodies.
C
They are equal in magnitude but not opposite always.
D
They are unequal in magnitudes even though opposite in direction
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