1
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language

An astronomical refracting telescope is being used by an observer to observe planets in normal adjustment. The focal lengths of the objective and eye piece used in the construction of the telescope are 20 m and 2 cm respectively. Consider the following statements about the telescope :

(a) The distance between the objective and eye piece is 20.02 m

(b) The magnification of the telescope is ($$-$$) 1000

(c) The image of the planet is erect and diminished

(d) The aperture of eye piece is smaller than that of objective

The correct statements are :

A
(a), (b) and (d)
B
(a), (b) and (c)
C
(b), (c) and (d)
D
(c), (d) and (a)
2
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language

The magnetic flux linked to a circular coil of radius R is

$$\phi = 2{t^3} + 4{t^2} + 2t + 5$$ Wb

The magnitude of induced emf in the coil at t = 5 s is

A
192 V
B
108 V
C
197 V
D
150 V
3
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language

Three vessels of equal capacity have gases at the same temperature and pressure. The first vessel contains helium (monoatomic), the second contains fluorine (diatomic) and the third contains sulfur hexafluoride (polyatomic). The correct statement, among the following is :

A
The root mean square speed of sulfur hexafluoride is the largest
B
All vessels contain unequal number of respective molecules
C
The root mean square speed of molecules is same in all three cases
D
The root mean square speed of helium is the largest
4
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language

An organ pipe filled with a gas at 27$$^\circ$$C resonates at 400 Hz in its fundamental mode. If it is filled with the same gas at 90$$^\circ$$C, the resonance frequency at the same mode will be

A
512 Hz
B
420 Hz
C
440 Hz
D
484 Hz
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