1
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

Let T1 and T2 be the energy of an electron in the first and second excited states of hydrogen atoms, respectively. According to the Bohr's model of an atom, the ratio T1 : T2 is

A
1 : 4
B
4 : 1
C
4 : 9
D
9 : 4
2
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

Match List - I with List - II

List - I List - II
(a) Gravitational constant (G) (i) $$[{L^2}{T^{ - 2}}]$$
(b) Gravitational potential energy (ii) $$[{M^{ - 1}}{L^3}{T^{ - 2}}]$$
(c) Gravitational potential (iii) $$[L{T^{ - 2}}]$$
(d) Gravitational intensity (iv) $$[M{L^2}{T^{ - 2}}]$$

Choose the correct answer from the options given below

A
(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
B
(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
C
(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
D
(a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
3
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

Two pendulums of length 121 cm and 100 cm start vibrating in phase. At some instant, the two are at their mean position in the same phase. The minimum number of vibrations of the shorter pendulum after which the two are again in phase at the mean position is :

A
11
B
9
C
10
D
8
4
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

The area of a rectangular field (in m2) of length 55.3 m and breadth 25 m after rounding off the value for correct significant digits is

A
138 $$\times$$ 101
B
1382
C
1382.5
D
14 $$\times$$ 102
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