1
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

The $$x$$ - $$t$$ graph of a particle performing simple harmonic motion is shown in the figure. The acceleration of the particle at $$t=2 \mathrm{~s}$$ is :

NEET 2023 Physics - Oscillations Question 8 English

A
$$-\frac{\pi^{2}}{8} \mathrm{~ms}^{-2}$$
B
$$\frac{\pi^{2}}{16} \mathrm{~ms}^{-2}$$
C
$$-\frac{\pi^{2}}{16} \mathrm{~ms}^{-2}$$
D
$$\frac{\pi^{2}}{8} \mathrm{~ms}^{-2}$$
2
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

For the following logic circuit, the truth table is:

NEET 2023 Physics - Semiconductor Electronics Question 15 English

A
A B Y
0 0 0
0 1 1
1 0 1
1 1 1
B
A B Y
0 0 1
0 1 0
1 0 1
1 1 0
C
A B Y
0 0 0
0 1 0
1 0 0
1 1 1
D
A B Y
0 0 1
0 1 1
1 0 1
1 1 0
3
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

A horizontal bridge is built across a river. A student standing on the bridge throws a small ball vertically upwards with a velocity $$4 \mathrm{~m} \mathrm{~s}^{-1}$$. The ball strikes the water surface after $$4 \mathrm{~s}$$. The height of bridge above water surface is (Take $$g=10 \mathrm{~m} \mathrm{~s}^{-2}$$ )

A
60 m
B
64 m
C
68 m
D
56 m
4
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

Two thin lenses are of same focal lengths $$(f)$$, but one is convex and the other one is concave. When they are placed in contact with each other, the equivalent focal length of the combination will be :

A
$$f / 4$$
B
$$f / 2$$
C
Infinite
D
Zero
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