1
MHT CET 2023 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of wavelengths for transition of electrons from $$2^{\text {nd }}$$ orbit to $$1^{\text {st }}$$ orbit of Helium $$\left(\mathrm{He}^{++}\right)$$ and Lithium $$\left(\mathrm{Li}^{++1}\right)$$ is (Atomic number of Helium $$=2$$, Atomic number of Lithium $$=3$$ )

A
$$9: 4$$
B
$$9: 36$$
C
$$4: 9$$
D
$$2: 3$$
2
MHT CET 2021 21th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A body at rest falls through a height 'h' with velocity 'V'. If it has to fall down further for its velocity to become three times, the distance travelled in that interval is

A
8 h
B
6 h
C
4 h
D
12 h
3
MHT CET 2021 21th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A bomb is dropped by an aeroplane flying horizontally with a velocity $$200 \mathrm{~km} / \mathrm{hr}$$ and at a height of $$980 \mathrm{~m}$$. At the time of dropping a bomb, the distance of the aeroplane from the target on the ground to hit directly is $$\left(g=9.8 \mathrm{~m} / \mathrm{s}^2\right)$$

A
$$\frac{\sqrt{2} \times 10^4}{9} \mathrm{~m}$$
B
$$\frac{10^4}{9} \mathrm{~m}$$
C
$$\frac{10^4}{9 \sqrt{2}}$$
D
$$\frac{10^4}{18} \mathrm{~m}$$
4
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A cricket player hit a ball like a projectile but the fielder caught the ball after 2 second. The maximum height reached by a ball is (g = 10 m/s2)

A
2 m
B
5 m
C
4 m
D
3 m
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